chore(package): update prettier to version 2.0.4

Closes #162

Author: greenkeeper[bot]

Diff for: package.json

@@ -52,7 +52,7 @@
     "lint-staged": "^8.0.4",
     "netlify-cms": "2.4.2",
     "nuxt": "^2.0.0",
-    "prettier": "^1.7.0",
+    "prettier": "^2.0.4",
     "request-promise-native": "^1.0.4",
     "standard-version": "^5.0.0"
   },