----------------
* Support only Python 3.7, see the 0.6.X releases for continued Python
3.6 support.
* Introduce ContextVars for local storage.
* Change default redirect status code to 302.
* Support integer/float cookie expires.
* Specify cookie date format (differs to Flask).
* Remove the Gunicorn workers, please use a ASGI server instead.
* Remove Gunicorn compatibility.
* Introduce a Headers data structure.
* Implement follow_redirects in Quart test client.
* Adopt the ASGI lifespan protocol.