Bump mongoose from 4.13.18 to 5.7.5

Bumps [mongoose](https://github.com/Automattic/mongoose) from 4.13.18 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@4.13.18...5.7.5)

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

Author: dependabot[bot]

package-lock.json

@@ -41,7 +41,7 @@
     "intl-locales-supported": "^1.0.0",
     "isomorphic-fetch": "^2.2.1",
     "limax": "^1.3.0",
-    "mongoose": "^4.4.20",
+    "mongoose": "^5.7.5",
     "react": "^15.1.0",
     "react-dom": "^15.1.0",
     "react-helmet": "^3.1.0",