[upd] pypi: Bump uvloop from 0.19.0 to 0.20.0
Bumps [uvloop](https://github.com/MagicStack/uvloop) from 0.19.0 to 0.20.0.
- [Release notes](https://github.com/MagicStack/uvloop/releases)
- [Commits](https://github.com/MagicStack/uvloop/compare/v0.19.0...v0.20.0)
---
updated-dependencies:
- dependency-name: uvloop
dependency-type: direct:production
update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>