chore: bump uvloop from 0.17.0 to 0.18.0

Bumps [uvloop](https://github.com/MagicStack/uvloop) from 0.17.0 to 0.18.0.
- [Release notes](https://github.com/MagicStack/uvloop/releases)
- [Commits](MagicStack/uvloop@v0.17.0...v0.18.0)

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

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

requirements.txt

@@ -15,4 +15,4 @@ ordered-set==4.1.0
 cachetools==5.3.1
 msgspec==0.18.4
 elytra-ms==0.2.1
-uvloop==0.17.0; platform_system == "Linux"
+uvloop==0.18.0; platform_system == "Linux"