Merge branch 'master' into update_references

Author: thangleiter

.github/workflows/main.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python_version: [3.6, 3.7, 3.8, 3.9]
+        python_version: ['3.7', '3.8', '3.9', '3.10']
         install_extras: ['tests', 'plotting,fancy_progressbar,tests', 'plotting,bloch_sphere_visualization,fancy_progressbar,doc,tests']
 
     steps:

README.md

@@ -63,7 +63,7 @@ infidelity = ff.infidelity(hadamard, spectrum, omega)
 ## Installation
 To install the package from PyPI, run `pip install filter_functions`. If you require the optional features provided by QuTiP (visualizing Bloch sphere trajectories), it is recommended to install QuTiP before by following the [instructions on their website](http://qutip.org/docs/latest/installation.html) rather than installing it through `pip`. To install the package from source run `python setup.py develop` to install using symlinks or `python setup.py install` without.
 
-To install dependencies of optional extras (`requests` for a fancy progress bar in Jupyter notebooks, `matplotlib` for plotting, `QuTiP` for Bloch sphere visualization), run `pip install -e .[extra]` where `extra` is one or more of `fancy_progressbar`, `plotting`, `bloch_sphere_visualization` from the root directory. To install all dependencies, including those needed to build the documentation and run the tests, use the extra `all`.
+To install dependencies of optional extras (`ipynbname` for a fancy progress bar in Jupyter notebooks, `matplotlib` for plotting, `QuTiP` for Bloch sphere visualization), run `pip install -e .[extra]` where `extra` is one or more of `fancy_progressbar`, `plotting`, `bloch_sphere_visualization` from the root directory. To install all dependencies, including those needed to build the documentation and run the tests, use the extra `all`.
 
 ## Documentation
 You can find the documentation on [Readthedocs](https://filter-functions.readthedocs.io/en/latest/). It is built from Jupyter notebooks that can also be run interactively and are located [here](doc/source/examples). The notebooks explain how to use the package and thus make sense to follow chronologically as a first step. Furthermore, there are also a few example scripts in the [examples](examples) folder.

setup.py

@@ -18,8 +18,8 @@ def extract_version(version_file):
     raise RuntimeError("Unable to find version string.")
 
 
-if sys.version_info < (3, 6):
-    sys.stderr.write('ERROR: You need Python 3.6 or later to install this package.\n')
+if sys.version_info < (3, 7):
+    sys.stderr.write('ERROR: You need Python 3.7 or later to install this package.\n')
     exit(1)
 
 extras_require = {'plotting': ['matplotlib'],