Bump djangorestframework from 3.9.0 to 3.11.2 in /src

[dependabot[bot]]

Bumps djangorestframework from 3.9.0 to 3.11.2.

Release notes

Sourced from djangorestframework's releases.

Version 3.9.3

This is the last Django REST Framework release that will support Python 2. Be sure to upgrade to Python 3 before upgrading to Django REST Framework 3.10.

• Adjusted the compat check for django-guardian to allow the last guardian version (v1.4.9) compatible with Python 2. #6613

Version 3.9.2

See Release Notes for details.

Version 3.9.1

Change Notes: https://www.django-rest-framework.org/community/release-notes/#39x-series

Commits

• 4121b01 Deprecate urlize_quoted_links in favor of Django's built-in urlize
• f3d9d68 Version 3.11.1
• eb2c4c2 Version 3.11.1
• de497a9 Version 3.11 (#7083)
• 3c1428f Fix NotImplementedError for Field.to_internal_value and Field.to_representati...
• b8c369c Fix serializer multiple inheritance bug (#6980)
• 7c54596 Declare Django versions in install_requires (#7063)
• 236667b Fix UniqueTogetherValidator with field sources (#7086)
• f744da7 Improve the docstring on @​action (#6951)
• de9f1d5 Followup to set_context removal (#7076)
• Additional commits viewable in compare view

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