fix(package): update react-scripts to version 3.3.1

Closes #9

Author: greenkeeper[bot]

package.json

@@ -6,7 +6,7 @@
     "axios": "^0.18.0",
     "react": "^16.4.2",
     "react-dom": "^16.4.2",
-    "react-scripts": "3.1.0",
+    "react-scripts": "3.3.1",
     "rxjs": "^6.2.2"
   },
   "scripts": {