OAuth2 v2.1 Release Notes

    • Refresh tokens now work for all grants
    • Rewrite most parts of the code to use OAuth2Error instead of NSError
    • ๐Ÿ‘Œ Improvements to password grant
    • Properly implement dynamic client registration
    • ๐Ÿ›  Fix issues #47, #59, #61, #66 and improve behavior in several scenarios