Log Message:
py-django-polymorphic: updated to 3.1.0

3.1.0

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.