PyJWT Exceptions

[NovaNekmit]

Problems:

The exceptions are stubbed in jwt (ie. jwt.MissingRequiredClaimError), but not the more explicit jwt.exceptions (ie jwt.exceptions.MissingRequiredClaimError).
Definitions are here: https://github.com/python/typeshed/blob/master/third_party/3/jwt/__init__.pyi#L25

PyJWK{,Set,Client}Error Exceptions are missing (see https://github.com/jpadilla/pyjwt/blob/master/jwt/exceptions.py#L57)

MissingRequiredClaimError is missing the claim attribute (see https://github.com/jpadilla/pyjwt/blob/master/jwt/exceptions.py#L51).
Definition is here: https://github.com/python/typeshed/blob/master/third_party/3/jwt/__init__.pyi#L35)

[srittau]

In typeshed we usually try to follow the implementation in cases like this, so some reshuffling of the exceptions seem in order. (I didn't check.) PRs welcome for these (and any other) issues.

[jdufresne]

FWIW, the PyJWT project has started including its own type annotations. Perhaps efforts would be better spent updating them in the library rather than in typeshed.

[hauntsaninja]

Closing as per #4856