Bump starlette from 0.27.0 to 0.40.0

Bumps [starlette](https://github.com/encode/starlette) from 0.27.0 to 0.40.0.
- [Release notes](https://github.com/encode/starlette/releases)
- [Changelog](https://github.com/encode/starlette/blob/master/docs/release-notes.md)
- [Commits](encode/starlette@0.27.0...0.40.0)

---
updated-dependencies:
- dependency-name: starlette
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -118,7 +118,7 @@ six==1.16.0
 sniffio==1.3.0
 soupsieve==2.4.1
 spinners==0.0.24
-starlette==0.27.0
+starlette==0.40.0
 SQLAlchemy==2.0.16
 tenacity==8.2.2
 termcolor==2.3.0