Update django requirement from ==2.2.* to ==3.0 (#421)
Update django requirement from ==2.2.* to ==3.0 (#421)

Updates the requirements on [django](https://github.com/django/django) to permit the latest version.
- [Release notes](https://github.com/django/django/releases)
- [Commits](https://github.com/django/django/compare/2.2a1...3.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
sanoma/django-arctic,sanoma/django-arctic,sanoma/django-arctic