Update Rust crate prettyplease to 0.2

Author: oxide-renovate[bot]

Cargo.lock

@@ -28,7 +28,7 @@ libloading = { version = "0.7" }
 num = { version = "0.4", features = ["serde"] }
 p4 = { path = "p4" }
 pnet = "0.31"
-prettyplease = "0.1"
+prettyplease = "0.2"
 proc-macro2 = "1.0"
 quote = "1.0"
 rand = "0.8.5"