Upgrade: Update prettier to version 2.0.1

Closes #36

Author: greenkeeper[bot]

package.json

@@ -91,7 +91,7 @@
     "husky": "^4.2.3",
     "less": "^3.11.1",
     "less-loader": "^5.0.0",
-    "prettier": "^1.19.1",
+    "prettier": "^2.0.1",
     "semantic-release": "^17.0.4",
     "style-loader": "^1.1.3",
     "url-loader": "^3.0.0",