chore(package): update prettier to version 2.0.3

Closes #45

Author: greenkeeper[bot]

package.json

@@ -65,7 +65,7 @@
     "husky": "^0.14.3",
     "jest": "^22.0.6",
     "nodemon": "^1.14.11",
-    "prettier": "^1.10.2",
+    "prettier": "^2.0.3",
     "semantic-release": "^12.4.1"
   },
   "jest": {