chore(deps): update dependency prettier to v1.19.1 (#834)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package-lock.json

@@ -80,7 +80,7 @@
     "mocha": "6.2.1",
     "ncp": "2.0.0",
     "node-sass": "4.13.0",
-    "prettier": "1.17.0",
+    "prettier": "1.19.1",
     "rimraf": "3.0.0",
     "rxjs": "6.5.3",
     "standard-version": "7.1.0",