Update sample

Author: JoshLipan

example/package-lock.json

@@ -9,7 +9,7 @@
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-preset-react-native-stage-0": "^1.0.1",
     "jcore-react-native": "^ 1.2.9",
-    "jmessage-react-plugin": "^2.4.1",
+    "jmessage-react-plugin": "^2.4.2",
     "mobx": "^3.4.1",
     "mobx-react": "^4.3.5",
     "react": "^16.0.0",