Merge pull request #1339 from cosmos/upgrade-prettier-2.8.1

Upgrade prettier to 2.8.1

packages/stargate/package.json

@@ -79,7 +79,7 @@
     "karma-jasmine": "^5",
     "karma-jasmine-html-reporter": "^1.5.4",
     "nyc": "^15.1.0",
-    "prettier": "^2.4.1",
+    "prettier": "^2.8.1",
     "readonly-date": "^1.0.0",
     "ses": "^0.11.0",
     "source-map-support": "^0.5.19",