chore(package): update prettier to version 2.0.2

Closes #133

Author: greenkeeper[bot]

package.json

@@ -70,7 +70,7 @@
     "jest": "^23.4.1",
     "morgan": "^1.9.0",
     "nodemon": "^1.18.3",
-    "prettier": "^1.13.7",
+    "prettier": "^2.0.2",
     "raf": "^3.4.0",
     "raw-loader": "^0.5.1",
     "react-test-renderer": "^16.4.1",