Added
* Add support for polymorphic models
* Add nested included serializer support for remapped relations
Changed
* Enforcing flake8 linting
Fixed
* When `JSON_API_FORMAT_KEYS` is False (the default) do not translate request
attributes and relations to snake\_case format. This conversion was unexpected
and there was no way to turn it off.
* Fix for apps that don't use `django.contrib.contenttypes`.
* Fix `resource_name` support for POST requests and nested serializers