It allows returning regular HTTP Response to a websocket request (if the ASGI Websocket Denial Response extension is supported, otherwise just closes with code 403 as before)

The current implementation was broken when used with websockets

This URL mapping logic has also been update:
- Fixing a few minor bugs
- It is now possible to specify the HTTP/HTTPS port mapping (e.g. 80/443, 8080/8443, etc)

- Both classes now share a common superclass, BaseExceptionMiddleware, which takes care of most of the logic
- Added ExceptionTypeOrStatusCode and ExceptionHandler to help on typing hints
- Error handlers now take a HTTPConnection instead of a Request
- Support for WebsocketDenialResponse

…esponse