Bump mongoose from 5.0.12 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.0.12 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@5.0.12...5.7.5)

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

package.json

@@ -39,7 +39,7 @@
     "logdna": "^1.4.0",
     "logzio-nodejs": "^0.4.10",
     "mocha": "^5.0.3",
-    "mongoose": "^5.0.12",
+    "mongoose": "^5.7.5",
     "mustache": "^2.3.0",
     "ordinal": "^1.0.2",
     "paipu": "^1.0.9",