Bump django-filter from 2.4.0 to 21.1 (#144)

Bumps [django-filter](https://github.com/carltongibson/django-filter) from 2.4.0 to 21.1.
- [Release notes](https://github.com/carltongibson/django-filter/releases)
- [Changelog](https://github.com/carltongibson/django-filter/blob/main/CHANGES.rst)
- [Commits](carltongibson/django-filter@2.4.0...21.1)

---
updated-dependencies:
- dependency-name: django-filter
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

requirements.txt

@@ -1,5 +1,5 @@
 Django>=1.11
-django-filter==2.4.0
+django-filter==21.1
 djangorestframework>=3.8.0
 djangorestframework-simplejwt>=4.4.0
 drfaddons>=0.1.0