Update to Mongolid v4

Upgrades the Mongolid/Mongolid-laravel version to v4.
Besides this changes does not affect or break anything from this particular package, it is most likely that everybody uses this package along with the mongolid/mongolid-laravel.

So, to make sure that we don't have any breaking changes updating this package, we will need to bump up this version.

See https://github.com/leroy-merlin-br/mongolid/releases/tag/v4.0.0-beta