Update 3.9 announcement

docs/community/3.9-announcement.md

@@ -19,7 +19,7 @@
 
 # Django REST framework 3.9
 
-The 3.9 release gives access to _extra actions_ in the Browsable API, introduces composable permissions and built-in [OpenAPI][openapi] schema support.
+The 3.9 release gives access to _extra actions_ in the Browsable API, introduces composable permissions and built-in [OpenAPI][openapi] schema support. (Formerly known as Swagger)
 
 ---
 
@@ -45,9 +45,9 @@ If you use REST framework commercially and would like to see this work continue,
 
 ---
 
-## In-built OpenAPI schema support
+## Built-in OpenAPI schema support
 
-REST framework now has a first-pass at directly including OpenAPI schema support.
+REST framework now has a first-pass at directly including OpenAPI schema support. (Formerly known as Swagger)
 
 Specifically:
 
@@ -77,10 +77,31 @@ urlpatterns = [
 
 And here's how you can use the `generateschema` management command:
 
-```
+```shell
 $ python manage.py generateschema --format openapi > schema.yml
 ```
 
+There's lots of different tooling that you can use for working with OpenAPI
+schemas. One option that we're working on is the [API Star](https://docs.apistar.com/)
+command line tool.
+
+You can use `apistar` to validate your API schema:
+
+```shell
+$ apistar validate --path schema.json --format openapi
+✓ Valid OpenAPI schema.
+```
+
+Or to build API documentation:
+
+```shell
+$ apistar docs --path schema.json --format openapi
+✓ Documentation built at "build/index.html".
+```
+
+API Star also includes a [dynamic client library](https://docs.apistar.com/client-library/)
+that uses an API schema to automatically provide a client library interface for making requests.
+
 ## Composable permission classes
 
 You can now compose permission classes using the and/or operators, `&` and `|`.
@@ -105,6 +126,12 @@ When defined, a dropdown of "Extra Actions", appropriately filtered to detail/no
 
 ---
 
+## Supported Versions
+
+REST framework 3.9 supports Django versions 1.11, 2.0, and 2.1.
+
+---
+
 ## Deprecations
 
 ### `DjangoObjectPermissionsFilter` moved to third-party package.
@@ -164,9 +191,19 @@ OpenAPI functionality.
 
 This will also make a wider range of tooling available.
 
-We'll focus on continuing to develop the `apistar` library and client tool into
-a recommended option for generating API docs, validating API schemas, and
-providing a dynamic client library.
+We'll focus on continuing to develop the [API Star](https://docs.apistar.com/)
+library and client tool into a recommended option for generating API docs,
+validating API schemas, and providing a dynamic client library.
+
+There's also a huge amount of ongoing work on maturing the ASGI landscape,
+with the possibility that some of this work will eventually [feed back into
+Django](https://www.aeracode.org/2018/06/04/django-async-roadmap/).
+
+There will be further work on the [Uvicorn](https://www.uvicorn.org/)
+webserver, as well as lots of functionality planned for the [Starlette](https://www.starlette.io/)
+web framework, which is building a foundational set of tooling for working with
+ASGI.
+
 
 [funding]: funding.md
 [gh5886]: https://github.com/encode/django-rest-framework/issues/5886