fix(package): update react-scripts to version 3.4.0

Closes #16

Author: greenkeeper[bot]

package.json

@@ -8,7 +8,7 @@
     "react": "^16.6.3",
     "react-dom": "^16.6.3",
     "react-router-dom": "^4.3.1",
-    "react-scripts": "3.1.0",
+    "react-scripts": "3.4.0",
     "recompose": "^0.30.0",
     "semantic-ui-css": "^2.4.1",
     "semantic-ui-react": "^0.87.1"