Update feedparser to 6.0.12

[pyup-bot]

This PR updates feedparser from 6.0.8 to 6.0.12.

Changelog

6.0.12

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

*   Fix an ``AssertionError`` crash that occurs with Python 3.10 and higher. (304)
*   Fix a ``DeprecationWarning`` thrown during calls to ``re.sub``. (389)
*   Add a Read the Docs configuration.

6.0.11

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

*   Resolve ``cgi`` module deprecation warnings. (330)

6.0.10

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

*   Populate ``<summary>`` correctly if it comes after ``<content>``. (260)

6.0.9

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

*   Fix a crash that can occur with GeoRSS feeds that lack a ``<where>`` tag. (305)

Links

• PyPI: https://pypi.org/project/feedparser
• Changelog: https://data.safetycli.com/changelogs/feedparser/
• Repo: https://github.com/kurtmckee/feedparser
• Docs: https://pythonhosted.org/feedparser/