Socketify

What is changed in uWebSockets:

- uWS never cared to optimize non-SSL, non-compressed semi-big WebSocket message sending, and so was a bit slower than what denoland/fastwebsockets v0.4.2 presented. This release adds such optimization and is now reliably and significantly faster in all cases.
- A few optimizations to the WebSocketProtocol.h.
- Fixes an edge case where URI querystrings with keys with no value gets interpreted as invalid querystring.
- Fixes an edge case where calling HttpResponse::upgrade inside HttpResponse::cork from inside a callback would crash.
- Properly uncork on large message backpressure

What is changed in socketify:

Fix async close wrappers

What is changed in socketify:

Drop support for Python 3.7: https://devguide.python.org/versions/

What is changed in socketify:

Added new strategy for loop relax, this will decrease CPU usage when no request is coming.
Fixed `wsgi.input` to never be None
Fixed `loop._run_once()` being called on ASGI when using uvloop

What is changed in socketify:

Revert loop relaxing too much

What is changed in socketify:

Fix memory leaks on WSGI and ASGI
Fix segfault on broken headers