chore(package): update prettier to version 2.0.2

Closes #618

Author: greenkeeper[bot]

package.json

@@ -118,7 +118,7 @@
     "npm-run-all": "4.1.5",
     "optimize-css-assets-webpack-plugin": "5.0.3",
     "postcss-loader": "3.0.0",
-    "prettier": "1.19.1",
+    "prettier": "2.0.2",
     "redux-devtools-extension": "2.13.8",
     "redux-mock-store": "1.5.4",
     "sass-loader": "8.0.0",