Bump django-filter from 21.1 to 22.1

[dependabot[bot]]

Bumps django-filter from 21.1 to 22.1.

Changelog

Sourced from django-filter's changelog.

Version 22.1 (2022-6-17)

• Update supported Python and Django versions: minimal Python is now 3.7, minimum Django is now 3.2.

• Added testing for Python 3.10 and Django 4.1.

• Removed outdated deprecated warnings for code removed in version 2.1.

• The code base is now formatted with Black.

Commits

• 2c81768 Updated isort config to use black profile.
• 6d02135 Renamed branch in GHA workflow.
• 9f188ff Added Black usage to change notes.
• f4866a9 Applied Black.
• ab35490 Updated version and change notes for 22.1 release.
• f532ca1 Removed duplicate Python version specifier.
• e2f560f Install package when building docs.
• 057eaee Added RTD config.
• b972fc7 Updated change notes.
• cd994e0 Updated copyright in docs.
• Additional commits viewable in compare view

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