fix(deps): update dependency react-scripts to v2.1.8

Author: renovate-bot

package.json

@@ -11,7 +11,7 @@
     "react": "16.8.0-alpha.1",
     "react-apollo": "2.4.1",
     "react-dom": "16.8.0-alpha.1",
-    "react-scripts": "2.1.3"
+    "react-scripts": "2.1.8"
   },
   "scripts": {
     "start": "react-scripts start",