[Security] Bump uvicorn from 0.10.3 to 0.11.7

Bumps [uvicorn](https://github.com/encode/uvicorn) from 0.10.3 to 0.11.7. **This update includes security fixes.**
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/CHANGELOG.md)
- [Commits](Kludex/uvicorn@0.10.3...0.11.7)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Author: dependabot-preview[bot]

requirements/production.txt

@@ -3,7 +3,7 @@
 -r base.txt
 
 # gunicorn==19.9.0  # https://github.com/benoitc/gunicorn
-uvicorn==0.10.3
+uvicorn==0.11.7
 psycopg2==2.8.5 --no-binary psycopg2  # https://github.com/psycopg/psycopg2
 Collectfast==1.3.1  # https://github.com/antonagestam/collectfast