* Add support for `response_model_exclude_defaults` and `response_model_exclude_none`:
* Deprecate the parameter `include_none` in `jsonable_encoder` and add the inverted `exclude_none`, to keep in sync with Pydantic.
* PR [#1166](https://github.com/tiangolo/fastapi/pull/1166) by [@voegtlel](https://github.com/voegtlel).
* Add example about [Testing a Database](https://fastapi.tiangolo.com/advanced/testing-database/). Initial PR [#1144](https://github.com/tiangolo/fastapi/pull/1144) by [@duganchen](https://github.com/duganchen).
* Update docs for [Development - Contributing: Translations](https://fastapi.tiangolo.com/contributing/#translations) including note about reviewing translation PRs. [#1215](https://github.com/tiangolo/fastapi/pull/1215).
* Update log style in README.md for GitHub Markdown compatibility. PR [#1200](https://github.com/tiangolo/fastapi/pull/1200) by [#geekgao](https://github.com/geekgao).