Bump django-polymorphic from 3.0.0 to 3.1.0

[dependabot[bot]]

Bumps django-polymorphic from 3.0.0 to 3.1.0.

Changelog

Sourced from django-polymorphic's changelog.

Changelog

Changes in 3.1 (2021-11-18)

• Added support for Django 4.0.
• Fixed crash when the admin "add type" view has no choices; will show a permission denied.
• Fixed missing locale folder in sdist.
• Fixed missing QuerySet.bulk_create(.., ignore_conflicts=True) parameter support.
• Fixed FilteredRelation support.
• Fixed supporting class keyword arguments in model definitions for __init_subclass__().
• Fixed including polymorphic.tests.migrations in the sdist.
• Fixed non-polymorphic parent handling, which has no _base_objects.
• Fixed missing widgets support for modelform_factory().
• Fixed has_changed handling for polymorphic_ctype_id due to implicit str to int conversions.
• Fixed Q object handling when lists are used (e.g. in django-advanced-filters_).
• Fixed Django Admin support when using a script-prefix.

Many thanks to everyone providing clear pull requests!

Commits

• 5111fb0 Bump to 3.1
• e9341fe Fix compilemessages call for setup.py
• 5b9acd1 isort and black with longer line length
• 8a5b555 Used pyupgrade to remove Python 2 and 3.5 compatibility code
• 6c69ea2 update test matrix in tox (GitHub Actions can be done later)
• db999f0 Add .coveragerc
• b90777b make depandabot happy
• 99b295a Fixed Django 4.0/4.1 deprecations in tests
• df51d54 Replace type(..) is checks with isinstance
• ec31670 Update childadmin.py
• Additional commits viewable in compare view

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