diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..c8ebd8c
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,41 @@
+name: halo
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+  test:
+    name: Test with ${{ matrix.python-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version:
+          - "3.8"
+          - "3.9"
+          - "3.10"
+          - "3.11"
+        os:
+          - ubuntu-latest
+          - macos-latest
+          - windows-latest
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Setup python for test ${{ matrix.python-version }}
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Install dependencies
+      run: |
+        python --version
+        python -m pip install --upgrade pip setuptools wheel
+        pip --version
+        python -m pip install --upgrade tox tox-gh>=1.2
+        tox --version
+    - name: Run tox targets for ${{ matrix.python-version }}
+      run: |
+        python -m tox
diff --git a/.gitignore b/.gitignore
index 22a596f..a5bed11 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,6 +105,7 @@ cover/
 
 # tests
 tests/*.txt
+.pytest_cache
 
 # OS-specific files
 .DS_Store
diff --git a/.pylintrc b/.pylintrc
index 9790dac..720692f 100644
--- a/.pylintrc
+++ b/.pylintrc
@@ -1,294 +1,370 @@
-[MASTER]
-
-# A comma-separated list of package or module names from where C extensions may
-# be loaded. Extensions are loading into the active Python interpreter and may
-# run arbitrary code
-extension-pkg-whitelist=
-
-# Add files or directories to the blacklist. They should be base names, not
-# paths.
-ignore=
-
-# Add files or directories matching the regex patterns to the blacklist. The
-# regex matches against base names, not paths.
-ignore-patterns=
+[MAIN]
 
 # Python code to execute, usually for sys.path manipulation such as
 # pygtk.require().
-init-hook=
-    import sys, os
-
-    if 'VIRTUAL_ENV' not in os.environ: \
-        sys.exit(0)
+#init-hook=
 
-    ve_dir = os.environ['VIRTUAL_ENV']
-    ve_dir in sys.path or sys.path.insert(0, ve_dir)
-    activate_this = os.path.join(os.path.join(ve_dir, 'bin'), 'activate_this.py')
+# Files or directories to be skipped. They should be base names, not
+# paths.
+ignore=CVS
 
-    # Fix for windows
-    if not os.path.exists(activate_this): \
-        activate_this = os.path.join(os.path.join(ve_dir, 'Scripts'), 'activate_this.py')
+# Add files or directories matching the regex patterns to the ignore-list. The
+# regex matches against paths and can be in Posix or Windows format.
+ignore-paths=
 
-    with open(activate_this) as fp: \
-        exec(fp.read(), dict(__file__=activate_this))
+# Files or directories matching the regex patterns are skipped. The regex
+# matches against base names, not paths.
+ignore-patterns=^\.#
 
-# Use multiple processes to speed up Pylint.
-jobs=1
+# Pickle collected data for later comparisons.
+persistent=yes
 
 # List of plugins (as comma separated values of python modules names) to load,
 # usually to register additional checkers.
 load-plugins=
+    pylint.extensions.check_elif,
+    pylint.extensions.bad_builtin,
+    pylint.extensions.docparams,
+    pylint.extensions.for_any_all,
+    pylint.extensions.set_membership,
+    pylint.extensions.code_style,
+    pylint.extensions.overlapping_exceptions,
+    pylint.extensions.typing,
+    pylint.extensions.redefined_variable_type,
+    pylint.extensions.comparison_placement,
+    pylint.extensions.broad_try_clause,
+    pylint.extensions.dict_init_mutate,
+    pylint.extensions.consider_refactoring_into_while_condition,
+
+# Use multiple processes to speed up Pylint. Specifying 0 will auto-detect the
+# number of processors available to use.
+jobs=1
 
-# Pickle collected data for later comparisons.
-persistent=yes
-
-# Specify a configuration file.
-#rcfile=
+# When enabled, pylint would attempt to guess common misconfiguration and emit
+# user-friendly hints instead of false-positive error messages.
+suggestion-mode=yes
 
 # Allow loading of arbitrary C extensions. Extensions are imported into the
 # active Python interpreter and may run arbitrary code.
 unsafe-load-any-extension=no
 
+# A comma-separated list of package or module names from where C extensions may
+# be loaded. Extensions are loading into the active Python interpreter and may
+# run arbitrary code
+extension-pkg-allow-list=
+
+# Minimum supported python version
+py-version = 3.8.0
+
+# Control the amount of potential inferred values when inferring a single
+# object. This can help the performance when dealing with large functions or
+# complex, nested conditions.
+limit-inference-results=100
+
+# Specify a score threshold under which the program will exit with error.
+fail-under=10.0
+
+# Return non-zero exit code if any of these messages/categories are detected,
+# even if score is above --fail-under value. Syntax same as enable. Messages
+# specified are enabled, while categories only check already-enabled messages.
+fail-on=
+
+# Clear in-memory caches upon conclusion of linting. Useful if running pylint in
+# a server-like mode.
+clear-cache-post-run=no
+
 
 [MESSAGES CONTROL]
 
 # Only show warnings with the listed confidence levels. Leave empty to show
 # all. Valid levels: HIGH, INFERENCE, INFERENCE_FAILURE, UNDEFINED
-confidence=
+# confidence=
+
+# Enable the message, report, category or checker with the given id(s). You can
+# either give multiple identifier separated by comma (,) or put this option
+# multiple time (only on the command line, not in the configuration file where
+# it should appear only once). See also the "--disable" option for examples.
+enable=
+    use-symbolic-message-instead,
+    useless-suppression,
 
 # Disable the message, report, category or checker with the given id(s). You
 # can either give multiple identifiers separated by comma (,) or put this
 # option multiple times (only on the command line, not in the configuration
 # file where it should appear only once).You can also use "--disable=all" to
-# disable everything first and then reenable specific checks. For example, if
+# disable everything first and then re-enable specific checks. For example, if
 # you want to run only the similarities checker, you can use "--disable=all
 # --enable=similarities". If you want to run only the classes checker, but have
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
-disable=print-statement,parameter-unpacking,unpacking-in-except,old-raise-syntax,backtick,long-suffix,old-ne-operator,old-octal-literal,import-star-module-level,raw-checker-failed,bad-inline-option,locally-disabled,locally-enabled,file-ignored,suppressed-message,useless-suppression,deprecated-pragma,apply-builtin,basestring-builtin,buffer-builtin,cmp-builtin,coerce-builtin,execfile-builtin,file-builtin,long-builtin,raw_input-builtin,reduce-builtin,standarderror-builtin,unicode-builtin,xrange-builtin,coerce-method,delslice-method,getslice-method,setslice-method,no-absolute-import,old-division,dict-iter-method,dict-view-method,next-method-called,metaclass-assignment,indexing-exception,raising-string,reload-builtin,oct-method,hex-method,nonzero-method,cmp-method,input-builtin,round-builtin,intern-builtin,unichr-builtin,map-builtin-not-iterating,zip-builtin-not-iterating,range-builtin-not-iterating,filter-builtin-not-iterating,using-cmp-argument,eq-without-hash,div-method,idiv-method,rdiv-method,exception-message-attribute,invalid-str-codec,sys-max-int,bad-python3-import,deprecated-string-function,deprecated-str-translate-call
 
-# Enable the message, report, category or checker with the given id(s). You can
-# either give multiple identifier separated by comma (,) or put this option
-# multiple time (only on the command line, not in the configuration file where
-# it should appear only once). See also the "--disable" option for examples.
-enable=
+disable=
+    attribute-defined-outside-init,
+    invalid-name,
+    missing-docstring,
+    protected-access,
+    too-few-public-methods,
+    # handled by black
+    format,
+    # We anticipate #3512 where it will become optional
+    fixme,
+    consider-using-assignment-expr,
 
 
 [REPORTS]
 
-# Python expression which should return a note less than 10 (10 is the highest
-# note). You have access to the variables errors warning, statement which
-# respectively contain the number of errors / warnings messages and the total
-# number of statements analyzed. This is used by the global evaluation report
-# (RP0004).
-evaluation=10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10)
-
-# Template used to display messages. This is a python new-style format string
-# used to format the message information. See doc for all details
-#msg-template=
-
-# Set the output format. Available formats are text, parseable, colorized, json
-# and msvs (visual studio).You can also give a reporter class, eg
+# Set the output format. Available formats are text, parseable, colorized, msvs
+# (visual studio) and html. You can also give a reporter class, eg
 # mypackage.mymodule.MyReporterClass.
 output-format=text
 
 # Tells whether to display a full report or only the messages
 reports=no
 
-# Activate the evaluation score.
-score=yes
+# Python expression which should return a note less than 10 (10 is the highest
+# note). You have access to the variables 'fatal', 'error', 'warning', 'refactor', 'convention'
+# and 'info', which contain the number of messages in each category, as
+# well as 'statement', which is the total number of statements analyzed. This
+# score is used by the global evaluation report (RP0004).
+evaluation=max(0, 0 if fatal else 10.0 - ((float(5 * error + warning + refactor + convention) / statement) * 10))
 
+# Template used to display messages. This is a python new-style format string
+# used to format the message information. See doc for all details
+#msg-template=
 
-[REFACTORING]
+# Activate the evaluation score.
+score=yes
 
-# Maximum number of nested blocks for function / method body
-max-nested-blocks=5
 
+[LOGGING]
 
-[BASIC]
+# Logging modules to check that the string format arguments are in logging
+# function parameter format
+logging-modules=logging
 
-# Naming hint for argument names
-argument-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+# The type of string formatting that logging methods do. `old` means using %
+# formatting, `new` is for `{}` formatting.
+logging-format-style=old
 
-# Regular expression matching correct argument names
-argument-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
 
-# Naming hint for attribute names
-attr-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+[MISCELLANEOUS]
 
-# Regular expression matching correct attribute names
-attr-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+# List of note tags to take in consideration, separated by a comma.
+notes=FIXME,XXX,TODO
 
-# Bad variable names which should always be refused, separated by a comma
-bad-names=foo,bar,baz,toto,tutu,tata
+# Regular expression of note tags to take in consideration.
+#notes-rgx=
 
-# Naming hint for class attribute names
-class-attribute-name-hint=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
 
-# Regular expression matching correct class attribute names
-class-attribute-rgx=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
+[SIMILARITIES]
 
-# Naming hint for class names
-class-name-hint=[A-Z_][a-zA-Z0-9]+$
+# Minimum lines number of a similarity.
+min-similarity-lines=6
 
-# Regular expression matching correct class names
-class-rgx=[A-Z_][a-zA-Z0-9]+$
+# Ignore comments when computing similarities.
+ignore-comments=yes
 
-# Naming hint for constant names
-const-name-hint=(([A-Z_][A-Z0-9_]*)|(__.*__))$
+# Ignore docstrings when computing similarities.
+ignore-docstrings=yes
 
-# Regular expression matching correct constant names
-const-rgx=(([A-Z_][A-Z0-9_]*)|(__.*__))$
+# Ignore imports when computing similarities.
+ignore-imports=yes
 
-# Minimum line length for functions/classes that require docstrings, shorter
-# ones are exempt.
-docstring-min-length=-1
+# Signatures are removed from the similarity computation
+ignore-signatures=yes
 
-# Naming hint for function names
-function-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
 
-# Regular expression matching correct function names
-function-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+[VARIABLES]
 
-# Good variable names which should always be accepted, separated by a comma
-good-names=i,j,k,ex,Run,_
+# Tells whether we should check for unused import in __init__ files.
+init-import=no
 
-# Include a hint for the correct naming format with invalid-name
-include-naming-hint=no
+# List of additional names supposed to be defined in builtins. Remember that
+# you should avoid defining new builtins when possible.
+additional-builtins=
 
-# Naming hint for inline iteration names
-inlinevar-name-hint=[A-Za-z_][A-Za-z0-9_]*$
+# List of strings which can identify a callback function by name. A callback
+# name must start or end with one of those strings.
+callbacks=cb_,_cb
 
-# Regular expression matching correct inline iteration names
-inlinevar-rgx=[A-Za-z_][A-Za-z0-9_]*$
+# Tells whether unused global variables should be treated as a violation.
+allow-global-unused-variables=yes
 
-# Naming hint for method names
-method-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+# List of names allowed to shadow builtins
+allowed-redefined-builtins=
 
-# Regular expression matching correct method names
-method-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+# List of qualified module names which can have objects that can redefine
+# builtins.
+redefining-builtins-modules=six.moves,past.builtins,future.builtins,builtins,io
 
-# Naming hint for module names
-module-name-hint=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
 
-# Regular expression matching correct module names
-module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
+[FORMAT]
 
-# Colon-delimited sets of names that determine each other's naming style when
-# the name regexes allow several styles.
-name-group=
+# Maximum number of characters on a single line.
+max-line-length=100
 
-# Regular expression which should only match function or class names that do
-# not require a docstring.
-no-docstring-rgx=^_
+# Regexp for a line that is allowed to be longer than the limit.
+ignore-long-lines=^\s*(# )?<?https?://\S+>?$
 
-# List of decorators that produce properties, such as abc.abstractproperty. Add
-# to this list to register other decorators that produce valid properties.
-property-classes=abc.abstractproperty
+# Allow the body of an if to be on the same line as the test if there is no
+# else.
+single-line-if-stmt=no
 
-# Naming hint for variable names
-variable-name-hint=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+# Allow the body of a class to be on the same line as the declaration if body
+# contains single statement.
+single-line-class-stmt=no
 
-# Regular expression matching correct variable names
-variable-rgx=(([a-z][a-z0-9_]{2,30})|(_[a-z0-9_]*))$
+# Maximum number of lines in a module
+max-module-lines=2000
 
+# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
+# tab).
+indent-string='    '
 
-[FORMAT]
+# Number of spaces of indent required inside a hanging or continued line.
+indent-after-paren=4
 
 # Expected format of line ending, e.g. empty (any line ending), LF or CRLF.
 expected-line-ending-format=
 
-# Regexp for a line that is allowed to be longer than the limit.
-ignore-long-lines=^\s*(# )?<?https?://\S+>?$
 
-# Number of spaces of indent required inside a hanging  or continued line.
-indent-after-paren=4
+[BASIC]
 
-# String used as indentation unit. This is usually "    " (4 spaces) or "\t" (1
-# tab).
-indent-string='    '
+# Good variable names which should always be accepted, separated by a comma
+good-names=i,j,k,ex,Run,_
 
-# Maximum number of characters on a single line.
-max-line-length=100
+# Good variable names regexes, separated by a comma. If names match any regex,
+# they will always be accepted
+good-names-rgxs=
 
-# Maximum number of lines in a module
-max-module-lines=1000
+# Bad variable names which should always be refused, separated by a comma
+bad-names=foo,bar,baz,toto,tutu,tata
 
-# List of optional constructs for which whitespace checking is disabled. `dict-
-# separator` is used to allow tabulation in dicts, etc.: {1  : 1,\n222: 2}.
-# `trailing-comma` allows a space between comma and closing bracket: (a, ).
-# `empty-line` allows space-only lines.
-no-space-check=trailing-comma,dict-separator
+# Bad variable names regexes, separated by a comma. If names match any regex,
+# they will always be refused
+bad-names-rgxs=
 
-# Allow the body of a class to be on the same line as the declaration if body
-# contains single statement.
-single-line-class-stmt=no
+# Colon-delimited sets of names that determine each other's naming style when
+# the name regexes allow several styles.
+name-group=
 
-# Allow the body of an if to be on the same line as the test if there is no
-# else.
-single-line-if-stmt=no
+# Include a hint for the correct naming format with invalid-name
+include-naming-hint=no
 
+# Naming style matching correct function names.
+function-naming-style=snake_case
 
-[LOGGING]
+# Regular expression matching correct function names
+function-rgx=[a-z_][a-z0-9_]{2,30}$
 
-# Logging modules to check that the string format arguments are in logging
-# function parameter format
-logging-modules=logging
+# Naming style matching correct variable names.
+variable-naming-style=snake_case
 
+# Regular expression matching correct variable names
+variable-rgx=[a-z_][a-z0-9_]{2,30}$
 
-[MISCELLANEOUS]
+# Naming style matching correct constant names.
+const-naming-style=UPPER_CASE
 
-# List of note tags to take in consideration, separated by a comma.
-notes=FIXME,XXX,TODO
+# Regular expression matching correct constant names
+const-rgx=(([A-Z_][A-Z0-9_]*)|(__.*__))$
 
+# Naming style matching correct attribute names.
+attr-naming-style=snake_case
 
-[SIMILARITIES]
+# Regular expression matching correct attribute names
+attr-rgx=[a-z_][a-z0-9_]{2,}$
 
-# Ignore comments when computing similarities.
-ignore-comments=yes
+# Naming style matching correct argument names.
+argument-naming-style=snake_case
 
-# Ignore docstrings when computing similarities.
-ignore-docstrings=yes
+# Regular expression matching correct argument names
+argument-rgx=[a-z_][a-z0-9_]{2,30}$
 
-# Ignore imports when computing similarities.
-ignore-imports=no
+# Naming style matching correct class attribute names.
+class-attribute-naming-style=any
 
-# Minimum lines number of a similarity.
-min-similarity-lines=4
+# Regular expression matching correct class attribute names
+class-attribute-rgx=([A-Za-z_][A-Za-z0-9_]{2,30}|(__.*__))$
 
+# Naming style matching correct class constant names.
+class-const-naming-style=UPPER_CASE
 
-[SPELLING]
+# Regular expression matching correct class constant names. Overrides class-
+# const-naming-style.
+#class-const-rgx=
 
-# Spelling dictionary name. Available dictionaries: none. To make it working
-# install python-enchant package.
-spelling-dict=
+# Naming style matching correct inline iteration names.
+inlinevar-naming-style=any
 
-# List of comma separated words that should not be checked.
-spelling-ignore-words=
+# Regular expression matching correct inline iteration names
+inlinevar-rgx=[A-Za-z_][A-Za-z0-9_]*$
 
-# A path to a file that contains private dictionary; one word per line.
-spelling-private-dict-file=
+# Naming style matching correct class names.
+class-naming-style=PascalCase
+
+# Regular expression matching correct class names
+class-rgx=[A-Z_][a-zA-Z0-9]+$
+
+
+# Naming style matching correct module names.
+module-naming-style=snake_case
+
+# Regular expression matching correct module names
+module-rgx=(([a-z_][a-z0-9_]*)|([A-Z][a-zA-Z0-9]+))$
 
-# Tells whether to store unknown words to indicated private dictionary in
-# --spelling-private-dict-file option instead of raising a message.
-spelling-store-unknown-words=no
+
+# Naming style matching correct method names.
+method-naming-style=snake_case
+
+# Regular expression matching correct method names
+method-rgx=[a-z_][a-z0-9_]{2,}$
+
+# Regular expression matching correct type variable names
+#typevar-rgx=
+
+# Regular expression which should only match function or class names that do
+# not require a docstring. Use ^(?!__init__$)_ to also check __init__.
+no-docstring-rgx=__.*__
+
+# Minimum line length for functions/classes that require docstrings, shorter
+# ones are exempt.
+docstring-min-length=-1
+
+# List of decorators that define properties, such as abc.abstractproperty.
+property-classes=abc.abstractproperty
 
 
 [TYPECHECK]
 
-# List of decorators that produce context managers, such as
-# contextlib.contextmanager. Add to this list to register other decorators that
-# produce valid context managers.
-contextmanager-decorators=contextlib.contextmanager
+# Regex pattern to define which classes are considered mixins if ignore-mixin-
+# members is set to 'yes'
+mixin-class-rgx=.*MixIn
+
+# List of module names for which member attributes should not be checked and
+# will not be imported (useful for modules/projects where namespaces are
+# manipulated during runtime and thus existing member attributes cannot be
+# deduced by static analysis). It supports qualified module names, as well
+# as Unix pattern matching.
+ignored-modules=
+
+# List of class names for which member attributes should not be checked (useful
+# for classes with dynamically set attributes). This supports the use of
+# qualified names.
+ignored-classes=SQLObject, optparse.Values, thread._local, _thread._local
 
 # List of members which are set dynamically and missed by pylint inference
 # system, and so shouldn't trigger E1101 when accessed. Python regular
 # expressions are accepted.
-generated-members=
+generated-members=REQUEST,acl_users,aq_parent,argparse.Namespace
+
+# List of decorators that create context managers from functions, such as
+# contextlib.contextmanager.
+contextmanager-decorators=contextlib.contextmanager
 
-# Tells whether missing members accessed in mixin class should be ignored. A
-# mixin class is detected if its name ends with "mixin" (case insensitive).
-ignore-mixin-members=yes
+# Tells whether to warn about missing members when the owner of the attribute
+# is inferred to be None.
+ignore-none=yes
 
 # This flag controls whether pylint should warn about no-member and similar
 # checks whenever an opaque object is returned when inferring. The inference
@@ -298,17 +374,6 @@ ignore-mixin-members=yes
 # the rest of the inferred objects.
 ignore-on-opaque-inference=yes
 
-# List of class names for which member attributes should not be checked (useful
-# for classes with dynamically set attributes). This supports the use of
-# qualified names.
-ignored-classes=optparse.Values,thread._local,_thread._local,Enum
-
-# List of module names for which member attributes should not be checked
-# (useful for modules/projects where namespaces are manipulated during runtime
-# and thus existing member attributes cannot be deduced by static analysis. It
-# supports qualified module names, as well as Unix pattern matching.
-ignored-modules=setup
-
 # Show a hint with possible names when a member name was not found. The aspect
 # of finding the hint is based on edit distance.
 missing-member-hint=yes
@@ -321,90 +386,83 @@ missing-member-hint-distance=1
 # showing a hint for a missing member.
 missing-member-max-choices=1
 
+[SPELLING]
 
-[VARIABLES]
-
-# List of additional names supposed to be defined in builtins. Remember that
-# you should avoid to define new builtins when possible.
-additional-builtins=
-
-# Tells whether unused global variables should be treated as a violation.
-allow-global-unused-variables=yes
-
-# List of strings which can identify a callback function by name. A callback
-# name must start or end with one of those strings.
-callbacks=cb_,_cb
-
-# A regular expression matching the name of dummy variables (i.e. expectedly
-# not used).
-dummy-variables-rgx=_+$|(_[a-zA-Z0-9_]*[a-zA-Z0-9]+?$)|dummy|^ignored_|^unused_
-
-# Argument names that match this expression will be ignored. Default to name
-# with leading underscore
-ignored-argument-names=_.*|^ignored_|^unused_
-
-# Tells whether we should check for unused import in __init__ files.
-init-import=no
-
-# List of qualified module names which can have objects that can redefine
-# builtins.
-redefining-builtins-modules=six.moves,future.builtins
-
+# Spelling dictionary name. Available dictionaries: none. To make it working
+# install python-enchant package.
+spelling-dict=
 
-[CLASSES]
+# List of comma separated words that should not be checked.
+spelling-ignore-words=
 
-# List of method names used to declare (i.e. assign) instance attributes.
-defining-attr-methods=__init__,__new__,setUp
+# List of comma separated words that should be considered directives if they
+# appear and the beginning of a comment and should not be checked.
+spelling-ignore-comment-directives=fmt: on,fmt: off,noqa:,noqa,nosec,isort:skip,mypy:,pragma:,# noinspection
 
-# List of member names, which should be excluded from the protected access
-# warning.
-exclude-protected=_asdict,_fields,_replace,_source,_make
+# A path to a file that contains private dictionary; one word per line.
+spelling-private-dict-file=.pyenchant_pylint_custom_dict.txt
 
-# List of valid names for the first argument in a class method.
-valid-classmethod-first-arg=cls
+# Tells whether to store unknown words to indicated private dictionary in
+# --spelling-private-dict-file option instead of raising a message.
+spelling-store-unknown-words=no
 
-# List of valid names for the first argument in a metaclass class method.
-valid-metaclass-classmethod-first-arg=mcs
+# Limits count of emitted suggestions for spelling mistakes.
+max-spelling-suggestions=2
 
 
 [DESIGN]
 
 # Maximum number of arguments for function / method
-max-args=5
+max-args = 9
 
-# Maximum number of attributes for a class (see R0902).
-max-attributes=7
+# Maximum number of locals for function / method body
+max-locals = 19
 
-# Maximum number of boolean expressions in a if statement
-max-bool-expr=5
+# Maximum number of return / yield for function / method body
+max-returns=11
 
 # Maximum number of branch for function / method body
-max-branches=12
+max-branches = 20
 
-# Maximum number of locals for function / method body
-max-locals=15
+# Maximum number of statements in function / method body
+max-statements = 50
 
-# Maximum number of parents for a class (see R0901).
-max-parents=7
+# Maximum number of attributes for a class (see R0902).
+max-attributes=11
 
-# Maximum number of public methods for a class (see R0904).
-max-public-methods=20
+# Maximum number of statements in a try-block
+max-try-statements = 7
 
-# Maximum number of return / yield for function / method body
-max-returns=6
+[CLASSES]
 
-# Maximum number of statements in function / method body
-max-statements=50
+# List of method names used to declare (i.e. assign) instance attributes.
+defining-attr-methods=__init__,__new__,setUp,__post_init__
+
+# List of valid names for the first argument in a class method.
+valid-classmethod-first-arg=cls
 
-# Minimum number of public methods for a class (see R0903).
-min-public-methods=2
+# List of valid names for the first argument in a metaclass class method.
+valid-metaclass-classmethod-first-arg=mcs
+
+# List of member names, which should be excluded from the protected access
+# warning.
+exclude-protected=_asdict,_fields,_replace,_source,_make
 
+# Warn about protected attribute access inside special methods
+check-protected-access-in-special-methods=no
 
 [IMPORTS]
 
+# List of modules that can be imported at any level, not just the top level
+# one.
+allow-any-import-level=
+
 # Allow wildcard imports from modules that define __all__.
 allow-wildcard-with-all=no
 
+# Allow explicit reexports by alias from a package __init__.
+allow-reexport-from-package=no
+
 # Analyse import fallback blocks. This can be used to support both Python 2 and
 # 3 compatible code, which means that the block might have code that exists
 # only in one or another interpreter, leading to false positives when analysed.
@@ -413,28 +471,79 @@ analyse-fallback-blocks=no
 # Deprecated modules which should not be used, separated by a comma
 deprecated-modules=regsub,TERMIOS,Bastion,rexec
 
-# Create a graph of external dependencies in the given file (report RP0402 must
-# not be disabled)
-ext-import-graph=
-
 # Create a graph of every (i.e. internal and external) dependencies in the
 # given file (report RP0402 must not be disabled)
 import-graph=
 
+# Create a graph of external dependencies in the given file (report RP0402 must
+# not be disabled)
+ext-import-graph=
+
 # Create a graph of internal dependencies in the given file (report RP0402 must
 # not be disabled)
 int-import-graph=
 
 # Force import order to recognize a module as part of the standard
 # compatibility libraries.
-known-standard-library=
+known-standard-library=_string
 
 # Force import order to recognize a module as part of a third party library.
 known-third-party=enchant
 
+# Couples of modules and preferred modules, separated by a comma.
+preferred-modules=
+
 
 [EXCEPTIONS]
 
 # Exceptions that will emit a warning when being caught. Defaults to
 # "Exception"
-overgeneral-exceptions=Exception
+overgeneral-exceptions=builtins.Exception
+
+
+[TYPING]
+
+# Set to ``no`` if the app / library does **NOT** need to support runtime
+# introspection of type annotations. If you use type annotations
+# **exclusively** for type checking of an application, you're probably fine.
+# For libraries, evaluate if some users what to access the type hints at
+# runtime first, e.g., through ``typing.get_type_hints``. Applies to Python
+# versions 3.7 - 3.9
+runtime-typing = no
+
+
+[DEPRECATED_BUILTINS]
+
+# List of builtins function names that should not be used, separated by a comma
+bad-functions=map,input
+
+
+[REFACTORING]
+
+# Maximum number of nested blocks for function / method body
+max-nested-blocks=5
+
+# Complete name of functions that never returns. When checking for
+# inconsistent-return-statements if a never returning function is called then
+# it will be considered as an explicit return statement and no message will be
+# printed.
+never-returning-functions=sys.exit,argparse.parse_error
+
+
+[STRING]
+
+# This flag controls whether inconsistent-quotes generates a warning when the
+# character used as a quote delimiter is used inconsistently within a module.
+check-quote-consistency=no
+
+# This flag controls whether the implicit-str-concat should generate a warning
+# on implicit string concatenation in sequences defined over several lines.
+check-str-concat-over-line-jumps=no
+
+
+[CODE_STYLE]
+
+# Max line length for which to sill emit suggestions. Used to prevent optional
+# suggestions which would get split by a code formatter (e.g., black). Will
+# default to the setting for ``max-line-length``.
+#max-line-length-suggestions=
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index f92eecf..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-language: python
-cache: pip
-git:
-  depth: 5
-matrix:
-  include:
-  - python: '3.5'
-    env: TOXENV=lint
-  - python: '3.5'
-    env: TOXENV=py35
-  - python: '3.6'
-    env: TOXENV=py36
-  - python: '3.7'
-    dist: xenial
-    sudo: true
-    env: TOXENV=py37
-    - python: '3.8'
-    dist: xenial
-    sudo: true
-    env: TOXENV=py38
-  fast_finish: true
-install:
-  - pip install tox coveralls
-script:
-  - tox -e $TOXENV
-after_success:
-  - coveralls
diff --git a/README.md b/README.md
index 5eb463c..6c22245 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
   halo
 </h1>
 
-[![Build Status](https://travis-ci.org/manrajgrover/halo.svg?branch=master)](https://travis-ci.org/manrajgrover/halo) [![Build status](https://ci.appveyor.com/api/projects/status/wa6t414gltr403ff?svg=true)](https://ci.appveyor.com/project/manrajgrover/halo) [![Coverage Status](https://coveralls.io/repos/github/manrajgrover/halo/badge.svg?branch=master)](https://coveralls.io/github/manrajgrover/halo?branch=master)
+[![Build Status](https://travis-ci.com/manrajgrover/halo.svg?branch=master)](https://travis-ci.com/manrajgrover/halo) [![Build status](https://ci.appveyor.com/api/projects/status/wa6t414gltr403ff?svg=true)](https://ci.appveyor.com/project/manrajgrover/halo) [![Coverage Status](https://coveralls.io/repos/github/manrajgrover/halo/badge.svg?branch=master)](https://coveralls.io/github/manrajgrover/halo?branch=master)
  [![PyPI](https://img.shields.io/pypi/v/halo.svg)](https://github.com/manrajgrover/halo) ![awesome](https://img.shields.io/badge/awesome-yes-green.svg) [![Downloads](https://pepy.tech/badge/halo)](https://pepy.tech/project/halo) [![Downloads](https://pepy.tech/badge/halo/month)](https://pepy.tech/project/halo/month)
 > Beautiful spinners for terminal, IPython and Jupyter
 
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 855678f..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,55 +0,0 @@
-init:
-  - ps: echo $env:TOXENV
-
-cache:
-  - '%LOCALAPPDATA%\pip\Cache'
-
-clone_depth: 5
-
-environment:
-  fast_finish: true
-  matrix:
-
-    - TOXENV: 'py35'
-      TOXPYTHON: C:\Python35\python.exe
-      PYTHON_HOME: C:\Python35
-      PYTHON_VERSION: '3.5'
-      PYTHON_ARCH: '32'
-
-    - TOXENV: 'py36'
-      TOXPYTHON: C:\Python36\python.exe
-      PYTHON_HOME: C:\Python36
-      PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '32'
-    
-    - TOXENV: 'py37'
-      TOXPYTHON: C:\Python37\python.exe
-      PYTHON_HOME: C:\Python37
-      PYTHON_VERSION: '3.7'
-      PYTHON_ARCH: '32'
-
-    - TOXENV: 'py38'
-      TOXPYTHON: C:\Python38\python.exe
-      PYTHON_HOME: C:\Python38
-      PYTHON_VERSION: '3.8'
-      PYTHON_ARCH: '32'
-    
-    - TOXENV: 'lint'
-      TOXPYTHON: C:\Python35\python.exe
-      PYTHON_HOME: C:\Python35
-      PYTHON_VERSION: '3.5'
-      PYTHON_ARCH: '32'
-
-matrix:
-  fast_finish: true
-
-install:
-  - '%PYTHON_HOME%\Scripts\pip --version'
-  - '%PYTHON_HOME%\Scripts\pip install tox'
-  - '%PYTHON_HOME%\Scripts\tox --version'
-  - '%PYTHON_HOME%\Scripts\virtualenv --version'
-
-build: off
-
-test_script:
-  - '%PYTHON_HOME%\Scripts\tox -e %TOXENV%'
diff --git a/halo/_utils.py b/halo/_utils.py
index 2f5b169..2e7c5e4 100644
--- a/halo/_utils.py
+++ b/halo/_utils.py
@@ -5,11 +5,9 @@
 import platform
 import six
 import sys
-try:
-    from shutil import get_terminal_size
-except ImportError:
-    from backports.shutil_get_terminal_size import get_terminal_size
 
+from colorama import init
+from shutil import get_terminal_size
 from termcolor import colored
 
 
diff --git a/halo/halo.py b/halo/halo.py
index f57ff59..c8368e7 100644
--- a/halo/halo.py
+++ b/halo/halo.py
@@ -102,7 +102,7 @@ def __init__(
 
         environment = get_environment()
 
-        def clean_up():
+        def clean_up(args):
             """Handle cell execution"""
             self.stop()
 
@@ -497,7 +497,7 @@ def start(self, text=None):
 
         self._stop_spinner = threading.Event()
         self._spinner_thread = threading.Thread(target=self.render)
-        self._spinner_thread.setDaemon(True)
+        self._spinner_thread.daemon = True
         self._render_frame()
         self._spinner_id = self._spinner_thread.name
         self._spinner_thread.start()
diff --git a/halo/halo_notebook.py b/halo/halo_notebook.py
index 753fd7a..3bf097b 100644
--- a/halo/halo_notebook.py
+++ b/halo/halo_notebook.py
@@ -53,6 +53,7 @@ def clear(self):
             self.output.outputs += self._output(self.CLEAR_LINE)
 
         self.output.outputs = self._output()
+        self.output.close()
         return self
 
     def _render_frame(self):
@@ -77,7 +78,7 @@ def start(self, text=None):
         display(self.output)
         self._stop_spinner = threading.Event()
         self._spinner_thread = threading.Thread(target=self.render)
-        self._spinner_thread.setDaemon(True)
+        self._spinner_thread.daemon = True
         self._render_frame()
         self._spinner_id = self._spinner_thread.name
         self._spinner_thread.start()
diff --git a/requirements-dev.txt b/requirements-dev.txt
index 22a29e1..f199d47 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 coverage>=4.4.1
-nose>=1.3.7
+pytest>=8.2.2
 pylint>=1.7.2
-tox>=2.8.2
+tox>=4
 twine>=1.12.1
diff --git a/requirements.txt b/requirements.txt
index 0cc3671..2c7c323 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,3 @@
-backports.shutil_get_terminal_size>=1.0.0;python_version < '3.3'
 log_symbols>=0.0.14
 spinners>=0.0.24
 termcolor>=1.1.0
diff --git a/setup.py b/setup.py
index 3de31cc..b95f471 100644
--- a/setup.py
+++ b/setup.py
@@ -15,9 +15,18 @@ def dependencies(file):
 
 setup(
     name="halo",
-    packages=find_packages(exclude=("tests", "examples")),
-    version="0.0.30",
+    packages=find_packages(exclude=("tests", "examples", "art")),
+    version="0.0.31",
     license="MIT",
+    classifiers=[
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3 :: Only",
+    ],
+    python_requires=">=3.4",
     description="Beautiful terminal spinners in Python",
     long_description=long_description,
     long_description_content_type="text/markdown",
@@ -41,5 +50,10 @@ def dependencies(file):
     install_requires=dependencies("requirements.txt"),
     tests_require=dependencies("requirements-dev.txt"),
     include_package_data=True,
-    extras_require={"ipython": ["IPython==5.7.0", "ipywidgets==7.1.0",]},
+    extras_require={
+        "ipython": [
+            "IPython>=8.12.3",
+            "ipywidgets>=8.1.3",
+        ]
+    },
 )
diff --git a/tests/test_halo.py b/tests/test_halo.py
index 6f204b2..b83f5c4 100644
--- a/tests/test_halo.py
+++ b/tests/test_halo.py
@@ -158,7 +158,7 @@ def test_text_stripping(self):
 
         pattern = re.compile(r'(✔|v) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
 
     def test_text_ellipsing(self):
         """Test the text gets ellipsed if it's too long
@@ -182,7 +182,7 @@ def test_text_ellipsing(self):
 
         pattern = re.compile(r'(✔|v) End!', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
 
     def test_text_animation(self):
         """Test the text gets animated when it is too long
@@ -205,7 +205,7 @@ def test_text_animation(self):
 
         pattern = re.compile(r'(✔|v) End!', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
 
     def test_context_manager(self):
         """Test the basic of basic spinners used through the with statement.
@@ -296,7 +296,7 @@ def test_succeed(self):
         output = self._get_test_output()['text']
         pattern = re.compile(r'(✔|v) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_succeed_with_new_text(self):
@@ -309,7 +309,7 @@ def test_succeed_with_new_text(self):
         output = self._get_test_output()['text']
         pattern = re.compile(r'(✔|v) bar', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_info(self):
@@ -322,7 +322,7 @@ def test_info(self):
         output = self._get_test_output()['text']
         pattern = re.compile(r'(ℹ|¡) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_fail(self):
@@ -335,7 +335,7 @@ def test_fail(self):
         output = self._get_test_output()['text']
         pattern = re.compile(r'(✖|×) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_warning(self):
@@ -348,7 +348,7 @@ def test_warning(self):
         output = self._get_test_output()['text']
         pattern = re.compile(r'(⚠|!!) Warning!', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_spinner_getters_setters(self):
@@ -543,7 +543,7 @@ def test_right_placement(self):
         pattern = re.compile(r"(✔|v)", re.UNICODE)
 
         self.assertEqual(text, 'foo')
-        self.assertRegexpMatches(symbol, pattern)
+        self.assertRegex(symbol, pattern)
         spinner.stop()
 
     def test_bounce_animation(self):
@@ -582,14 +582,14 @@ def filler_text(n_chars):
         zipped_expected_and_actual_frame = zip(expected_frames, output)
         for multiple_frames in zipped_expected_and_actual_frame:
             expected_frame, actual_frame = multiple_frames
-            self.assertEquals(expected_frame, actual_frame)
+            self.assertEqual(expected_frame, actual_frame)
 
     def test_animation_setter(self):
         spinner = Halo("Asdf")
         spinner.animation = "bounce"
-        self.assertEquals("bounce", spinner.animation)
+        self.assertEqual("bounce", spinner.animation)
         spinner.animation = "marquee"
-        self.assertEquals("marquee", spinner.animation)
+        self.assertEqual("marquee", spinner.animation)
 
     @unittest.skipIf(sys.platform.startswith("win"), "ANSI not supported on Windows")
     def test_spinner_color(self):
@@ -605,7 +605,7 @@ def test_spinner_color(self):
             output = self._get_test_output(no_ansi=False)
             output_merged = [arr for c in output['colors'] for arr in c]
 
-            self.assertEquals(str(color_int) in output_merged, True)
+            self.assertEqual(str(color_int) in output_merged, True)
 
     def test_redirect_stdout(self):
         """Test redirect stdout
diff --git a/tests/test_halo_notebook.py b/tests/test_halo_notebook.py
index b6d55a9..69c3330 100644
--- a/tests/test_halo_notebook.py
+++ b/tests/test_halo_notebook.py
@@ -126,7 +126,7 @@ def test_text_stripping(self):
 
         pattern = re.compile(r'(✔|v) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
 
     def test_text_ellipsing(self):
         """Test the text gets ellipsed if it's too long
@@ -152,7 +152,7 @@ def test_text_ellipsing(self):
 
         pattern = re.compile(r'(✔|v) End!', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
 
     def test_text_animation(self):
         """Test the text gets animated when it is too long
@@ -177,7 +177,7 @@ def test_text_animation(self):
 
         pattern = re.compile(r'(✔|v) End!', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
 
     def test_context_manager(self):
         """Test the basic of basic spinners used through the with statement.
@@ -257,7 +257,7 @@ def test_succeed(self):
         output = self._get_test_output(spinner)['text']
         pattern = re.compile(r'(✔|v) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_succeed_with_new_text(self):
@@ -270,7 +270,7 @@ def test_succeed_with_new_text(self):
         output = self._get_test_output(spinner)['text']
         pattern = re.compile(r'(✔|v) bar', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_info(self):
@@ -283,7 +283,7 @@ def test_info(self):
         output = self._get_test_output(spinner)['text']
         pattern = re.compile(r'(ℹ|¡) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_fail(self):
@@ -296,7 +296,7 @@ def test_fail(self):
         output = self._get_test_output(spinner)['text']
         pattern = re.compile(r'(✖|×) foo', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_warning(self):
@@ -309,7 +309,7 @@ def test_warning(self):
         output = self._get_test_output(spinner)['text']
         pattern = re.compile(r'(⚠|!!) Warning!', re.UNICODE)
 
-        self.assertRegexpMatches(output[-1], pattern)
+        self.assertRegex(output[-1], pattern)
         spinner.stop()
 
     def test_spinner_getters_setters(self):
@@ -407,7 +407,7 @@ def test_right_placement(self):
         pattern = re.compile(r"(✔|v)", re.UNICODE)
 
         self.assertEqual(text, "foo")
-        self.assertRegexpMatches(symbol, pattern)
+        self.assertRegex(symbol, pattern)
         spinner.stop()
 
     def test_spinner_color(self):
@@ -422,7 +422,7 @@ def test_spinner_color(self):
 
             output_merged = [arr for c in output['colors'] for arr in c]
 
-            self.assertEquals(str(color_int) in output_merged, True)
+            self.assertEqual(str(color_int) in output_merged, True)
 
     def tearDown(self):
         """Clean up things after every test.
diff --git a/tox.ini b/tox.ini
index 7b63e7f..ecd54bb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,14 +1,17 @@
 [tox]
 envlist =
-    py34,
-    py35,
-    py36,
-    py37,
-    py38,
+    py{38,39,310,311}-{linux,macos,windows},
     lint
 skip_missing_interpreters =
     True
 
+[gh]
+python =
+    3.8 = py38, lint
+    3.9 = py39
+    3.10 = py310
+    3.11 = py311
+
 [testenv]
 # See https://github.com/pytest-dev/pytest/pull/5222#issuecomment-492428610
 download = True
@@ -22,7 +25,7 @@ setenv =
     LANG=en_US.UTF-8
 
 commands =
-    nosetests --cover-package=halo --with-coverage --cover-erase --cover-branches --nologcapture
+    pytest
 
 [testenv:lint]
 commands =