Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.18.1 to 1.18.5.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](https://github.com/tokio-rs/tokio/compare/tokio-1.18.1...tokio-1.18.5)

---
updated-dependencies:
- dependency-name: tokio
  dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>