chore(package): update prettier to version 2.0.2

Closes #108

Author: greenkeeper[bot]

package.json

@@ -101,7 +101,7 @@
     "karma-coverage-istanbul-reporter": "^2.0.5",
     "karma-jasmine": "^2.0.1",
     "karma-junit-reporter": "^1.2.0",
-    "prettier": "^1.18.2",
+    "prettier": "^2.0.2",
     "pretty-quick": "^1.11.1",
     "protractor": "~5.4.0",
     "puppeteer": "^1.18.1",