chore(package): update react-scripts to version 3.1.2

Closes #10

Author: greenkeeper[bot]

package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "devDependencies": {
-    "react-scripts": "3.1.0"
+    "react-scripts": "3.1.2"
   },
   "dependencies": {
     "normalizr": "^3.3.0",