Bump yaml-rust2 from 0.8.1 to 0.9.0

Bumps [yaml-rust2](https://github.com/Ethiraric/yaml-rust2) from 0.8.1 to 0.9.0.
- [Release notes](https://github.com/Ethiraric/yaml-rust2/releases)
- [Changelog](https://github.com/Ethiraric/yaml-rust2/blob/master/CHANGELOG.md)
- [Commits](Ethiraric/yaml-rust2@v0.8.1...v0.9.0)

---
updated-dependencies:
- dependency-name: yaml-rust2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -21,7 +21,7 @@ serde = { version = "1", features = ["derive"] }
 serde_yaml = "0.9"
 structopt = "0.3"
 uuid = { version = "1.10", features = ["v4"] }
-yaml-rust2 = "0.8.1"
+yaml-rust2 = "0.9.0"
 simplelog = "0.12"
 nix = { version = "0.29", default-features = false, features = ["user"] }
 shlex = "1.3"