Fix failing compat import
Using the general built-in 'pk' property of Django's User model instead of 'id'.
Merge pull request #26 from cheerzorpo/user-pk

User ID property in payloads (and tests)
Bump up version for release
[refresh-token] add refresh token endpoint

typo

[refresh-token] Refactor renew token stuff, add jwt_get_user_id_from_payload_handler for custom user_id format
[refresh-token] add tests for refresh token feature

some more api checks