~~~~~
* Replace RoleFilterMixin role_filter_group with role_filter_classes (thanks hugobrilhante).
* Replace Travis with Github Actions.
* Drop Python 3.5 support.
* Drop DRF 3.5.x/3.6.x/3.7.x/3.8.x/3.9.x support.
* Add suport for DRF 3.10.x/3.11.x.
* Drop support for Django 1.11.x/2.0.x/2.1.x.
* Add support for Django 2.2.x/3.0.x.
* Apply black format on project.
* Apply isort on project.