Drf-messages

* ADDED Support for all session engines (not only DB engine)

- **ADDED** Support for Django 3.2
- **NEW** Methods for Message model
- **NEW** Collection-like interface for Storage objects
- **NEW** CI/CD for testing, linting and deploying
- **BUG FIX** Messages incorrectly marked read after using list endpoint
- **BUG FIX** Errors when querying messages from request without a session

- **NEW** Peak messages endpoint

First release!🎉