fix: add "none" algorithm for JWS

[lepture]

This will fix #42

[azmeuk]

jwt.decode(payload, None) and jwt.encode({"alg":"none"}, {"foo":"bar"}, None) raise an exception due to this line:

joserfc/src/joserfc/rfc7515/registry.py

Line 62 in ae89af1

raise UnsupportedAlgorithmError(f"Algorithm of '{name}' is not recommended")

Maybe a warning would be better? Anyway I think users should enable or disable warnings about recommended algorithms, because it can quickly be noisy. This can be the subject of another ticket though.

LGTM otherwise. Thank you 🙏

[lepture]

This is because none is not a recommended algorithm. You need to pass supported algorithms manually: https://jose.authlib.org/en/guide/jws/#unsupportedalgorithmerror

[azmeuk]

Ok. I am not totally accustomed to joserfc yet :)
Anyway, this works great. Thank you!