chore(package): update prettier to version 2.0.3

Closes #36

Author: greenkeeper[bot]

package.json

@@ -102,7 +102,7 @@
     "jest": "^22.0.2",
     "lint-staged": "^6.0.0",
     "lodash.camelcase": "^4.3.0",
-    "prettier": "^1.4.4",
+    "prettier": "^2.0.3",
     "prompt": "^1.0.0",
     "replace-in-file": "^3.0.0-beta.2",
     "rimraf": "^2.6.1",