Add support for Django 5.0

1.0

• 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

Add support for non-S3 endpoints

What's Changed

• Сustom bucket endpoint url by @kidig in #38
• Update linting configs and pre-commit
• Replace travis-ci with Github actions

New Contributors

• @kidig made their first contribution in #38

Full Changelog: v0.3.1...v0.4