Add support for Django 4.0

[sliverc]

Description of the Bug Report

Django 4.0a1 has been released. As it is marked as feature freeze we can also add it to our test suite.

DRF has also already added it. As a reference to implement this have a look at #908

Checklist

• Certain that this is a bug (if unsure or you have a question use discussions instead)
• Code snippet or unit test added to reproduce bug