Bump mongoose from 5.1.3 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.1.3 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@5.1.3...5.7.5)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -11,7 +11,7 @@
     "express-session": "^1.15.6",
     "express-jwt": "^5.3.1",
     "jsonwebtoken": "^8.2.2",
-    "mongoose": "^5.1.3",
+    "mongoose": "^5.7.5",
     "morgan": "^1.9.0",
     "passport-local": "^1.0.0",
     "passport": "^0.4.0",