fix(package): updated the package-lock.json files

Author: AnthonyNahas

demo/package.json

@@ -95,7 +95,7 @@
     "webpack-node-externals": "~1.7.2"
   },
   "engines": {
-    "node": ">=8.0.0"
+    "node": ">=12.0.0"
   },
   "greenkeeper": {
     "ignore": [