Django-s3-upload

- Add Django 5.0 to build matrix
- Add Python 3.12 to build matrix
- Drop support for Django < 3.2
- Drop support for Python 3.7

What's Changed
* Сustom bucket endpoint url by kidig in https://github.com/yunojuno/django-s3-upload/pull/38
* Update linting configs and pre-commit
* Replace travis-ci with Github actions

New Contributors
* kidig made their first contribution in https://github.com/yunojuno/django-s3-upload/pull/38

**Full Changelog**: https://github.com/yunojuno/django-s3-upload/compare/v0.3.1...v0.4