Update django-model-utils to 5.0.0

[pyup-bot]

This PR updates django-model-utils from 4.5.1 to 5.0.0.

Changelog

5.0.0

------------------
- Add formal support for `Django 5.1`
- Remove MonitorField deprecation warning. `None` - instead of
`django.utils.timezone.now` will be used when nullable and no default provided (GH-599)
- Add deprecation warning for MonitorField. The default value will be `None`
instead of `django.utils.timezone.now` - when nullable and without a default.
- Add Brazilian Portuguese translation (GH-578)
- Don't use `post_init` signal for initialize tracker
- Make `contribute_to_class()` in `StatusField`, `MonitorField` and `SplitField`
forward additional arguments to Django
- `SplitField` no longer accepts `no_excerpt_field` as a keyword argument
- Make `soft` argument to `SoftDeletableModel.delete()` keyword-only
- `JoinManager` and `JoinManagerMixin` have been deprecated;
please use ``JoinQueryset.as_manager()`` instead
- Change `SoftDeletableQuerySetMixin.delete` to replicate Django's API.

Links

• PyPI: https://pypi.org/project/django-model-utils
• Changelog: https://data.safetycli.com/changelogs/django-model-utils/
• Repo: https://github.com/jazzband/django-model-utils