Update docutils to 0.20.1

[pyup-bot]

This PR updates docutils from 0.18.1 to 0.20.1.

Changelog

0.20.1

===========================

Bugfix release. See HISTORY_ for details.

0.20

=========================

.. Note::

Docutils 0.20 is the last version supporting Python 3.7 and 3.8.

* General

- Support Python 3.11 (patch 198 by Hugo van Kemenade).

* Output changes:

HTML5:
 Use dpub-ARIA role "doc-footnote" (instead of ARIA role "note")
 for footnotes.

LaTeX:
 Do not load the `inputenc` package in UTF-8 encoded LaTeX sources.
 (UTF-8 is the default encoding for LaTeX2e since 2018).

* Configuration changes:

- Settings in the [latex2e writer] configuration file section
 are now ignored by the "xetex" writer.
 Place common settings in section `[latex writers]`_.

 .. _[latex writers]: docs/user/config.htmllatex-writers

- New command line setting output_. Obsoletes the ``<destination>``
 positional argument (cf. `future changes`__).

 __ `command-line usage pattern`_

* `utils.find_file_in_dirs()` now returns a POSIX path also on Windows;
`utils.get_stylesheet_list()` no longer converts ``\`` to ``/``.

* docutils/languages/
docutils/parsers/rst/languages/

- Support Ukrainian. Patch by Dmytro Kazanzhy.

* test/coverage.sh

- Removed. Use the coverage.py_ project instead,
 ``coverage run test/alltests.py`` and ``coverage report``.

.. _coverage.py: https://pypi.org/project/coverage/

* tools/

- Moved ``quicktest.py`` to ``tools/dev/``.

* Bugfixes and improvements (see HISTORY_).

.. _output: docs/user/config.htmloutput

0.19

=========================

0.19b1

* Drop support for Python 2.7, 3.5, and 3.6.

* Output changes:

HTML5:
 Wrap groups of footnotes in an ``<aside>`` for easier styling.

 The CSS rule ``.footnote-list { display: contents; }`` can be used to
 restore the behaviour of custom CSS styles.

* After package installation, the CLI commands ``python -m docutils`` and
``docutils`` start the `generic command line front end tool`_.

.. _generic command line front end tool:
   docs/user/tools.htmlgeneric-command-line-front-end

* Support parsing "Markdown" input with 3rd party parsers
myst_, pycmark_, or recommonmark_.

* The default values for the "pep-references", "rfc-base-url",
and "python-home" `configuration settings`_ now use the "https:" scheme.
The PEP-writer template's header is updated to fix links and
resemble the header of official PEPs.

* Various bugfixes and improvements (see HISTORY_).

.. _myst: https://pypi.org/project/myst-docutils
.. _pycmark: https://pypi.org/project/pycmark/
.. _recommonmark: https://pypi.org/project/recommonmark/
.. _configuration settings: docs/user/config.html

Links

• PyPI: https://pypi.org/project/docutils
• Changelog: https://data.safetycli.com/changelogs/docutils/
• Homepage: https://docutils.sourceforge.io/