chore(package): update prettier to version 2.0.5

Closes #42

Author: greenkeeper[bot]

package.json

@@ -104,7 +104,7 @@
     "jest": "^22.0.2",
     "lint-staged": "^7.0.0",
     "lodash.camelcase": "^4.3.0",
-    "prettier": "^1.4.4",
+    "prettier": "^2.0.5",
     "prompt": "^1.0.0",
     "react": "^16.2.0",
     "react-dom": "^16.2.0",