REST framework 3.9 is released!

[Tom Christie]

Hey all,

Our 3.9 release is now out!
Release notes available
here: https://www.django-rest-framework.org/community/3.9-announcement/

Headline features are:

* Built-in OpenAPI support. (We'll continue to mature this for 3.10)
* `generate_schema` management command.
* Composable permissions.
* Extra actions shown in the browsable API.

Tying in with this is also the API Star command line tool,
which will give you schema validation
<https://docs.apistar.com/schema-validation/>, API documentation generation
<https://docs.apistar.com/api-documentation/>,
and a dynamic client library <https://docs.apistar.com/client-library/>
that's schema-driven.

Thanks so much to everyone who's been a part of it!

- Tom