New features
* Add options to override how Django Choice fields are converted to Enums (860)
* Detect schema export format from output file path (to support exporting .graphql files) (868)
Bugfixes
* Allow string references in DjangoListField (885)
* Use actual root/variables/context args of the execute method (878)
* Include form data in DjangoFormMutation responses (811)
* Exclude read_only fields from input in DRF mutation (882)
* Fix a typo in the warning (884)
* Use to_representation in favor of get_attribute (848)
Huge thanks to B4rtware, fulaphex, knabben, protasovse, GeyseR and rip-the-jacker for helping!
Full changelog: https://github.com/graphql-python/graphene-django/compare/v2.8.2...v2.9.0