fix(package): update react-scripts to version 3.0.0

Closes #47

Author: greenkeeper[bot]

package.json

@@ -17,7 +17,7 @@
     "react-native": "https://github.com/expo/react-native/archive/sdk-27.0.0.tar.gz",
     "react-native-web": "^0.10.1",
     "react-primitives": "^0.7.0",
-    "react-scripts": "2.1.2",
+    "react-scripts": "3.0.0",
     "react-sketchapp": "^2.0.0",
     "react-test-renderer": "^16.8.3"
   },