Update dependency prettier to v2.4.0

Author: renovate-bot

package-lock.json

@@ -18,7 +18,7 @@
     "eslint-plugin-prettier": "3.4.0",
     "husky": "6.0.0",
     "lint-staged": "10.5.4",
-    "prettier": "2.3.2",
+    "prettier": "2.4.0",
     "pretty-quick": "3.1.1"
   },
   "homepage": "https://github.com/e2e-boilerplate/selenium-webdriver-commonjs-mocha-assert#readme",