fix(deps): update dependency react-scripts to v3

Author: renovate-bot

example/react/package.json

@@ -7,7 +7,7 @@
     "react": "^16.6.0",
     "react-dom": "^16.6.0",
     "react-router-dom": "^4.3.1",
-    "react-scripts": "^2.0.0"
+    "react-scripts": "^3.0.0"
   },
   "scripts": {
     "start": "SKIP_PREFLIGHT_CHECK=true react-scripts start",