This takes the serving code from Quart 0.5.0 and turns it into a
working ASGI server. This will then allow Quart to be an ASGI
Framework with Hypercorn as the ASGI Server. This in turn allows
for a richer asyncio based web ecosystem, as different frameworks
can be paired with differing servers.

The name Hypercorn has been chosen as the code is built on the
excellent sans-io Hyper libraries, h11, h2, and wsproto whilst being
inspired by Gunicorn.