Bump mongoose from 5.6.4 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.6.4 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@5.6.4...5.7.5)

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

Author: dependabot[bot]

package-lock.json

@@ -15,7 +15,7 @@
     "fs": "^0.0.1-security",
     "http": "^0.0.0",
     "ipware": "^2.0.0",
-    "mongoose": "^5.6.4",
+    "mongoose": "^5.7.5",
     "mysql": "^2.17.1",
     "path": "^0.12.7",
     "socket.io": "^2.2.0",