fix(package): update react-scripts to version 3.1.0

Author: greenkeeper[bot]

package.json

@@ -7,7 +7,7 @@
     "lorem-ipsum": "^1.0.6",
     "react": "^16.4.2",
     "react-dom": "^16.4.2",
-    "react-scripts": "3.0.1",
+    "react-scripts": "3.1.0",
     "styled-components": "^4.0.2"
   },
   "scripts": {