* Fix small typos. PR [#941](https://github.com/tiangolo/fastapi/pull/941).
* Update and clarify docs for dependencies with `yield`. PR [#986](https://github.com/tiangolo/fastapi/pull/986).
* Add Mermaid JS support for diagrams in docs. Add first diagrams to [Dependencies: First Steps](https://fastapi.tiangolo.com/tutorial/dependencies/) and [Dependencies with `yield` and `HTTPException`](https://fastapi.tiangolo.com/tutorial/dependencies/dependencies-with-yield/#dependencies-with-yield-and-httpexception). PR [#985](https://github.com/tiangolo/fastapi/pull/985).
* Update CI to run docs deployment in GitHub actions. PR [#983](https://github.com/tiangolo/fastapi/pull/983).