Bump starlette from 0.13.1 to 0.40.0 in /src

Bumps [starlette](https://github.com/encode/starlette) from 0.13.1 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@0.13.1...0.40.0)

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

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

src/requirements.txt

@@ -12,7 +12,7 @@ git+https://github.com/lardbit/tmdbsimple.git
 transmissionrpc==0.11
 uvicorn[standard]==0.18.1
 whitenoise==5.0.1
-starlette==0.13.1
+starlette==0.40.0
 websocket-client==0.57.0
 django-redis==4.11.0
 celery-once==3.0.1