add dev-dependencies.
@@ -20,6 +20,9 @@ proc-macro = true
syn = { version = "1.0", features = ["extra-traits", "parsing"] }
proc-macro2 = "1.0"
quote = "1.0"
-serde_derive = "1.0"
+serde = "1.0"
identity_diff = {path = "../identity_diff", version = "0.1.0"}
+
+[dev-dependencies]
+serde_json = "1.0"
\ No newline at end of file
