chore(deps): update rust crate serde to ^1.0.189

Author: renovate[bot]

Cargo.toml

@@ -9,7 +9,7 @@ authors = ["Mate Antunovic <mateATschnooty.com"]
 readme = "README.md"
 
 [dependencies]
-serde = "^1.0"
+serde = "^1.0.189"
 serde_derive = "^1.0"
 tiny-keccak = { version = "2.0.2", features = ["keccak"] }
 secp256k1 = {version = "0.27.0", features = ["recovery"] }