Unit tests failing

[dhblum]

Output from travis:

$ pip install --upgrade pip && pip install pandas==1.2.5 numpy==1.20.2 matplotlib==3.3.4 requests==2.25.1 pathlib==1.0.1
Requirement already satisfied: pip in /home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages (22.0.4)
Collecting pandas==1.2.5
  Downloading pandas-1.2.5-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.whl (9.7 MB)
Collecting numpy==1.20.2
  Downloading numpy-1.20.2-cp39-cp39-manylinux2010_x86_64.whl (15.4 MB)
Collecting matplotlib==3.3.4
  Downloading matplotlib-3.3.4-cp39-cp39-manylinux1_x86_64.whl (11.5 MB)
Collecting requests==2.25.1
  Downloading requests-2.25.1-py2.py3-none-any.whl (61 kB)
Collecting pathlib==1.0.1
  Downloading pathlib-1.0.1.tar.gz (49 kB)
  Preparing metadata (setup.py) ... error
  error: subprocess-exited-with-error
  
  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [20 lines of output]
      Traceback (most recent call last):
        File "<string>", line 2, in <module>
        File "<pip-setuptools-caller>", line 34, in <module>
        File "/tmp/pip-install-aopk_7qn/pathlib_2d189ec4554b41ba84eb7fe11daece76/setup.py", line 6, in <module>
          setup(
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/_distutils/core.py", line 109, in setup
          _setup_distribution = dist = klass(attrs)
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/dist.py", line 460, in __init__
          for ep in metadata.entry_points(group='distutils.setup_keywords'):
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 999, in entry_points
          return SelectableGroups.load(eps).select(**params)
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 449, in load
          ordered = sorted(eps, key=by_group)
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 997, in <genexpr>
          dist.entry_points for dist in unique(distributions())
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 609, in entry_points
          return EntryPoints._from_text_for(self.read_text('entry_points.txt'), self)
        File "/home/travis/virtualenv/python3.9.12/lib/python3.9/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 917, in read_text
          return self._path.joinpath(filename).read_text(encoding='utf-8')
      AttributeError: 'PosixPath' object has no attribute 'read_text'
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed
× Encountered error while generating package metadata.
╰─> See above for output.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
The command "pip install --upgrade pip && pip install pandas==1.2.5 numpy==1.20.2 matplotlib==3.3.4 requests==2.25.1 pathlib==1.0.1" failed and exited with 1 during .
Your build has been stopped.

Seems to be a problem with installing pathlib?

[dhblum]

Closed by #417.