Bump mongoose from 5.6.10 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.6.10 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@5.6.10...5.7.5)

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

Author: dependabot[bot]

package-lock.json

@@ -33,7 +33,7 @@
     "md5": "^2.2.1",
     "moment": "^2.22.2",
     "moment-timezone": "^0.5.21",
-    "mongoose": "^5.2.9",
+    "mongoose": "^5.7.5",
     "passport": "^0.4.0",
     "passport-http-header-strategy": "^1.0.4",
     "passport-local": "^1.0.0",