Update dependencies
Update dependencies

Expand supported versions of `six` to be `<2.0`.
Add `jwt` extra which specifies supported versions of `python-jose` for
decode_id_token.

globus/globus-sdk-python,globus/globus-sdk-python,sirosen/globus-sdk-python,globusonline/globus-sdk-python,aaschaer/globus-sdk-python