chore(deps): update dependency prettier to v2.7.1

Author: renovate[bot]

package.json

@@ -91,7 +91,7 @@
     "mocha": "8.4.0",
     "mongoose": "5.12.13",
     "nyc": "15.1.0",
-    "prettier": "2.3.1",
+    "prettier": "2.7.1",
     "rimraf": "3.0.2",
     "rollup": "2.51.2"
   },