build(deps): bump tokio from 1.40.0 to 1.42.0

Bumps [tokio](https://github.com/tokio-rs/tokio) from 1.40.0 to 1.42.0.
- [Release notes](https://github.com/tokio-rs/tokio/releases)
- [Commits](tokio-rs/tokio@tokio-1.40.0...tokio-1.42.0)

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

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

Cargo.toml

@@ -146,7 +146,7 @@ thiserror = { version = "1.0.65", default-features = false }
 time = { version = "0.3.36", default-features = false }
 # Tokio is used for async test-running and for certain binaries.
 # The library crates do not require Tokio.
-tokio = { version = "1.28.0", default-features = false }
+tokio = { version = "1.42.0", default-features = false }
 trycmd = "0.15.4" # keep in sync with `snapbox`
 unicode-segmentation = { version = "1.10.1", default-features = false }
 unicode-width = { version = "0.2", default-features = false }