dependencies: added serde as dev dependency

Author: raphael-goetz

Cargo.lock

@@ -18,3 +18,7 @@ tonic-health = { workspace = true }
 tonic = { workspace = true }
 taurus-core = { workspace = true }
 taurus-provider = { workspace = true }
+
+[dev-dependencies]
+serde = { workspace = true }
+serde_json = { workspace = true }