Update demo dependencies

Author: Oblosys

examples/parent-child-demo/package.json

@@ -15,6 +15,6 @@
     "react": "^17.0.2",
     "react-dom": "^17.0.2",
     "react-hot-loader": "^4.13.0",
-    "react-lifecycle-visualizer": "2.2.12"
+    "react-lifecycle-visualizer": "3.0.0"
   }
 }