Bump uvicorn from 0.11.6 to 0.11.7 in /docs/examples/fastapi_sqlalche…

…my (#26)

Bumps [uvicorn](https://github.com/encode/uvicorn) from 0.11.6 to 0.11.7.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](encode/uvicorn@0.11.6...0.11.7)

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docs/examples/fastapi_sqlalchemy/requirements.txt

@@ -1,7 +1,7 @@
 fastapi==0.59.0
 pydantic==1.6.1
 starlette==0.13.4
-uvicorn==0.11.6
+uvicorn==0.11.7
 graphene==2.1.8
 pydantic-sqlalchemy==0.0.4
 pydantic2graphene==0.3.1