fix(package): update react-scripts to version 3.1.1

Closes #26

Author: greenkeeper[bot]

examples/package.json

@@ -29,7 +29,7 @@
   "dependencies": {
     "react": "^16.1.1",
     "react-dom": "^16.1.1",
-    "react-scripts": "^2.0.3",
+    "react-scripts": "^3.1.1",
     "or-button": "^1.1.0"
   }
 }