Bump async-timeout from 4.0.3 to 5.0.1

Bumps [async-timeout](https://github.com/aio-libs/async-timeout) from 4.0.3 to 5.0.1.
- [Release notes](https://github.com/aio-libs/async-timeout/releases)
- [Changelog](https://github.com/aio-libs/async-timeout/blob/master/CHANGES.rst)
- [Commits](aio-libs/async-timeout@v4.0.3...v5.0.1)

---
updated-dependencies:
- dependency-name: async-timeout
  dependency-type: indirect
  update-type: version-update:semver-major
...

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