chore(deps): Update Rust crate serde_yaml to 0.9.0

Cargo.toml

@@ -126,7 +126,7 @@ required-features = ["cli", "yaml", "json", "toml", "schema"]
 
 [dependencies]
 serde = { version = "1.0.150", features = ["derive"], optional = true }
-serde_yaml = { version = "0.8.17", optional = true }
+serde_yaml = { version = "0.9.0", optional = true }
 serde_json = { version = "1.0", optional = true }
 toml = { version = "0.8", optional = true }
 humantime = { version = "2", optional = true }