Update prettier to version 2.4.1

Author: depfu[bot]

package.json

@@ -68,7 +68,7 @@
     "mocha": "^8.2.1",
     "nyc": "^15.0.0",
     "offline-github-changelog": "^1.7.0",
-    "prettier": "~2.3.0",
+    "prettier": "~2.4.1",
     "puppeteer": "^10.0.0",
     "semver": "^7.0.0",
     "stream-http": "^3.0.0",