==============================================
* Only Sphinx >= 4.0.0 is now supported.
* Only Python >= 3.6 is supported.
* Fixed numerous warnings due to `deprecated Sphinx API`_.
* Use ``sphinx.ext.autodoc.directive.DocumenterBridge.record_dependencies``
insted of ``sphinx.ext.autodoc.directive.DocumenterBridge.filename_set``.
* Use ``str.rpartition()`` insted of ``sphinx.util.rpartition()``
* Remove use of ``sphinx.util.force_decode()``.
* Use ``inspect.getmembers()`` insted of
``sphinx.util.inspect.safe_getmembers()``.
* Remove use of encoding argument in ``autodoc.Documenter.get_doc()``.
* Fixed `Issue 101 <https://github.com/sphinx-contrib/matlabdomain/issues/101>`_.
* CI now tests on Python 3.6, 3.7, 3.8 and 3.9.