This is a previous closed pull request (#4) in unique commit.
Ticket #4102 - Allow UPDATE of only specific fields in model.save()
Ticket #4102 - Add tests for proxied models.
Ticket #4102 - Add test for m2n fields.
Reset password hashers cache on settings_changed.
Ensured tests pass using custom PASSWORD_HASHERS.
Use faster password hasher in sqlite tests
Fixed #18246 -- Replaced bash-specific syntax in geodjango postgis he…
Thanks jose for the report.
Fixed tests for date-based generic views.
Fixed #18214 -- Clarified the docs about serializable objects.
Updated some URLs in the documentation to point to the new repository.
Removed unused file from i18n regression tests.
Fixed #18042 -- Advanced deprecation warnings.
Thanks Ramiro for the patch.
Replaced deprecated TestCase methods. Refs #17049.
Merge branch 'master' into issue_4102_1