Added
* added `select_related` in intospect view for better query performance
* 831 Authorization token creation now can receive an expire date
* 831 Added a method to override Grant creation
* 825 Bump oauthlib to 3.1.0 to introduce PKCE
* Support for Django 3.1
Fixed
* 847: Fix inappropriate message when response from authentication server is not OK.
Changed
* few smaller improvements to remove older django version compatibility 830, 861, 862, 863