Bump mongoose from 5.5.11 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.5.11 to 5.7.5.
- [Release notes](https://github.com/Automattic/mongoose/releases)
- [Changelog](https://github.com/Automattic/mongoose/blob/master/History.md)
- [Commits](Automattic/mongoose@5.5.11...5.7.5)

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

Author: dependabot[bot]

package-lock.json

@@ -16,7 +16,7 @@
     "graphql": "^14.3.1",
     "jsonwebtoken": "^8.5.1",
     "moment": "^2.24.0",
-    "mongoose": "^5.5.11",
+    "mongoose": "^5.7.5",
     "nodemon": "^1.19.1"
   }
 }