Add linter for insecure crypto use in authlib library

[mschwager]

The Python Authlib library provides various authentication functionality. There are some potential insecurities surrounding its crypto usage. These include:

• JsonWebEncryption(algorithms=['RSA1_5'])
• JsonWebSignature(algorithms=['RS256'])
• JsonWebSignature(algorithms=['RS384'])
• JsonWebSignature(algorithms=['RS512'])

These algorithms make use of RSA PKCSv1.5 which has some security considerations. Let's write a linter to check for this usage.