Bump cargo-util from 0.2.15 to 0.2.16

Bumps [cargo-util](https://github.com/rust-lang/cargo) from 0.2.15 to 0.2.16.
- [Changelog](https://github.com/rust-lang/cargo/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/cargo/commits)

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

Signed-off-by: dependabot[bot] <[email protected]>