Add Serialization.jl to juliapkg.json

juliapkg.json

@@ -9,6 +9,10 @@
         "ClusterManagers": {
             "uuid": "34f1f09b-3a8b-5176-ab39-66d58a4d544e",
             "version": "0.4"
+        },
+        "Serialization": {
+            "uuid": "9e88b42a-f829-5b0c-bbe9-9e923198166b",
+            "version": "1"
         }
     }
 }