fix: enable serde_json dependency

Author: todor-a

Cargo.toml

@@ -44,7 +44,7 @@ percent-encoding = "2.3.1"
 phf = { version = "0.11", features = ["macros"] }
 rustc-hash = "2.1.1"
 serde = { version = "1.0.144", features = ["derive"] }
-serde_json = { version = "1.0", optional = true }
+serde_json = "1.0"
 thiserror = "2.0.18"
 
 [dev-dependencies]