feat: upgrade mongodb from 3.5.9 to 6.9.0

Snyk has created this PR to upgrade mongodb from 3.5.9 to 6.9.0.

See this package in npm:
https://www.npmjs.com/package/mongodb

See this project in Snyk:
https://app.snyk.io/org/panda-co/project/ebfb2282-581e-4b1b-afb0-8a0e07b1b540?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -35,7 +35,7 @@
     "marked": "0.3.5",
     "method-override": "latest",
     "moment": "2.15.1",
-    "mongodb": "^3.5.9",
+    "mongodb": "^6.9.0",
     "mongoose": "4.2.4",
     "morgan": "latest",
     "ms": "^0.7.1",