chore(cargo): bump tracing from 0.1.37 to 0.1.39 (#451)

Bumps [tracing](https://github.com/tokio-rs/tracing) from 0.1.37 to 0.1.39.
- [Release notes](https://github.com/tokio-rs/tracing/releases)
- [Commits](tokio-rs/tracing@tracing-0.1.37...tracing-0.1.39)

---
updated-dependencies:
- dependency-name: tracing
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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