Bump tokio from 1.51.0 to 1.52.1 (#56)

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.51.0 to 1.52.1.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.51.0...tokio-1.52.1)

---
updated-dependencies:
- dependency-name: tokio
  dependency-version: 1.52.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]