chore(package): update prettier to version 2.0.4

Closes #8

Author: greenkeeper[bot]

package.json

@@ -71,7 +71,7 @@
 		"coveralls": "^3.0.9",
 		"mocha": "^6.2.2",
 		"nyc": "^15.0.0",
-		"prettier": "^1.19.1",
+		"prettier": "^2.0.4",
 		"sonarjs": "^1.0.0",
 		"source-map-support": "^0.5.16",
 		"ts-node": "^8.5.4",