fix(deps): bump mongodb from 3.5.3 to 3.6.4

Bumps [mongodb](https://github.com/mongodb/node-mongodb-native) from 3.5.3 to 3.6.4.
- [Release notes](https://github.com/mongodb/node-mongodb-native/releases)
- [Changelog](https://github.com/mongodb/node-mongodb-native/blob/3.6/CHANGES_3.0.0.md)
- [Commits](mongodb/node-mongodb-native@v3.5.3...v3.6.4)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -30,7 +30,7 @@
     "express-session": "^1.17.0",
     "jsonwebtoken": "^8.5.1",
     "lodash": "^4.17.21",
-    "mongodb": "^3.3.0",
+    "mongodb": "^3.6.4",
     "mongoose": "^5.6.10",
     "mongoose-encryption": "^2.0.3",
     "mongoose-unique-validator": "^2.0.3",