chore(package): update prettier to version 2.0.4

Closes #796

Author: greenkeeper[bot]

packages/admin-ui/package.json

@@ -74,7 +74,7 @@
     "eslint-plugin-react": "^7.4.0",
     "jest-junit": "^6.0.0",
     "nightwatch": "^1.0.16",
-    "prettier": "^1.11.1",
+    "prettier": "^2.0.4",
     "react-axe": "^3.0.1",
     "react-scripts": "3.0.1",
     "react-test-renderer": "^16.6.3",