Add support for Django 5.0

[StopMotionCuber]

Right now this tool is not allowed with Django 5.0, as per dependencies it requires Django 3.x or 4.x. Therefore installing django-contract-tester leads to a downgrade of Django (with 5.0 installed).

For my use case it works flawlessly with Django 5.0, so it would be great having that also supported in the dependencies. I'm not sure whether it makes sense to set a maximum Django version in the dependencies at all or whether going with >= 3 would be fine.

[maticardenas]

Hi @StopMotionCuber, thanks for bringing this to attention.

I agree we should add 5.0 to be allowed in the dependencies. I will revisit actually current django version constraints at pyproject.toml and do some tests, ideally probably it should align with defined django compatibility