Fixes#7417.
Fixes all these issues seen with `tox -e py38-django31`:
```
/Users/chainz/Documents/Projects/django-rest-framework/tests/test_request.py:208: RemovedInDjango40Warning: Passing None for the middleware get_response argument is deprecated.
SessionMiddleware().process_request(self.wrapped_request)
tests/test_requests_client.py: 1 test with warning
tests/test_testing.py: 4 tests with warnings
tests/test_throttling.py: 1 test with warning
tests/authentication/test_authentication.py: 4 tests with warnings
tests/browsable_api/test_browsable_api.py: 4 tests with warnings
/Users/chainz/Documents/Projects/django-rest-framework/rest_framework/authentication.py:139: RemovedInDjango40Warning: Passing None for the middleware get_response argument is deprecated.
check = CSRFCheck()
```
* Add drf-psq to third party packages
* Add drf-psq to permissions.md
this package is an extension that gives support for having action-based **permission_classes**, **serializer_class**, and **queryset** dependent on permission-based rules.
Co-authored-by: Salar Nasiri <salarnasiri@users.noreply.github.com>
* url() is deprecated in Django 3.1
* update given feedbacks on url() is deprecated in Django 3.1
* Fix test_urlpatterns.py to continue testing mixed re_path() and path()
* Fix one missed reference
Co-authored-by: sanjusci <sanju.sci9@gmail.com>
Django 3.1 adds a new generic JSONField to replace the PostgreSQL-specific one. This adds support for the new field type, which should behave the same as the existing PostgreSQL field.
Django's new JSONField also includes support for a custom "decoder", so add support for that in the serializer field.
The changed links were not working on the documentation site. I'm not 100% sure that these changes are correct but they generate working links in the GitHub previews.
* Adjusted token admin to map to user ID.
Closes#6131.
* Adds a proxy model for Token that uses the user.pk, rather than it's own.
* Adjusts Admin to map back from User ID to token instance.
* Update sponsors
Co-authored-by: Carlton Gibson <carlton.gibson@noumenal.es>
