v1.6.3

Note: I accidentally published v1.6.2 and removed it from PyPI, that's why the jump to v1.6.3

Changed

• All exceptions inherit from PyJWTError #340

Added

• Add type hints #344
• Add help module 7ca41e5

Docs

• Added section to usage docs for jwt.get_unverified_header() #350
• Update legacy instructions for using pycrypto #337