chore(deps): bump uvloop from 0.18.0 to 0.19.0

Bumps [uvloop](https://github.com/MagicStack/uvloop) from 0.18.0 to 0.19.0.
- [Release notes](https://github.com/MagicStack/uvloop/releases)
- [Commits](MagicStack/uvloop@v0.18.0...v0.19.0)

---
updated-dependencies:
- dependency-name: uvloop
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

requirements.txt

@@ -45,7 +45,7 @@ typing-extensions==4.0.1; python_full_version >= "3.6.2" and python_full_version
 ujson==4.2.0; python_full_version >= "3.6.2" and python_version >= "3.6" and python_full_version < "4.0.0"
 urllib3==1.26.7; python_full_version >= "3.6.1" and python_version < "4"
 uvicorn==0.15.0; python_full_version >= "3.6.2" and python_full_version < "4.0.0"
-uvloop==0.18.0
+uvloop==0.19.0
 watchgod==0.8.2
 websockets==12.0
 yarl==1.7.0; python_version >= "3.7" and python_version < "4.0"