chore(package): update prettier to version 2.0.5

Closes #66

Author: greenkeeper[bot]

package.json

@@ -46,7 +46,7 @@
     "eslint-config-finn-prettier": "^3.0.2",
     "husky": "^1.3.0",
     "lint-staged": "^8.1.0",
-    "prettier": "^1.15.3",
+    "prettier": "^2.0.5",
     "semantic-release": "^15.13.1",
     "travis-deploy-once": "^5.0.0"
   },