Websocket support

[magbb]

Hi!

Thanks for this great add-on.

Does the interceptor-proxy support websockets, or do I have to enable it somewhere? I have looked everywhere, but couldn't find anything. In my Python Streamlit (streamlit.io) webapp, which relies on websockets, I get a 403 forbidden for the websocket connections, everything else seems to work nicely.

Thanks in advance.

[wozniakjan]

#835