chore(package): update prettier to version 2.0.1

Closes #36

Author: greenkeeper[bot]

package.json

@@ -10,7 +10,7 @@
   "devDependencies": {
     "ava": "^0.25.0",
     "fixpack": "^2.3.1",
-    "prettier": "^1.13.5",
+    "prettier": "^2.0.1",
     "standard": "^11.0.0"
   },
   "homepage": "https://jew.ski/raj/",