Bump mongoose from 5.0.14 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 5.0.14 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@5.0.14...5.7.5)

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

package.json

@@ -40,7 +40,7 @@
     "itunes-search": "git+https://github.com/connor/itunes-node.git",
     "jest": "^22.4.3",
     "moment": "^2.21.0",
-    "mongoose": "^5.0.14",
+    "mongoose": "^5.7.5",
     "remove-accents": "^0.4.2",
     "request": "^2.85.0",
     "rss-parser": "^3.1.2",