Bump mongoose from 5.11.19 to 5.12.0

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.11.19 to 5.12.0.
- [Release notes](https://github.com/Automattic/mongoose/releases)
- [Changelog](https://github.com/Automattic/mongoose/blob/master/History.md)
- [Commits](Automattic/mongoose@5.11.19...5.12.0)

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

package.json

@@ -14,7 +14,7 @@
     "express": "^4.17.1",
     "express-rate-limit": "^5.2.6",
     "mongodb": "^3.6.4",
-    "mongoose": "^5.11.19",
+    "mongoose": "^5.12.0",
     "mongoose-sequence": "^5.3.1",
     "typescript": "^4.2.3",
     "valid-url": "^1.0.9"