[upd] pypi: Bump uvloop from 0.20.0 to 0.21.0

Bumps [uvloop](https://github.com/MagicStack/uvloop) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/MagicStack/uvloop/releases)
- [Commits](https://github.com/MagicStack/uvloop/compare/v0.20.0...v0.21.0)

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

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

requirements.txt

@@ -9,7 +9,7 @@ python-dateutil==2.9.0.post0
 pyyaml==6.0.2
 httpx[http2]==0.24.1
 Brotli==1.1.0
-uvloop==0.20.0
+uvloop==0.21.0
 httpx-socks[asyncio]==0.7.7
 setproctitle==1.3.3
 redis==5.0.8