Issue title: When is this package compatible with Laravel 5.5?
 Issue body: When is this package compatible with Laravel 5.5?
thx
 Comments: 
 Comment 0: +1
 Comment 1: +1
 Comment 2: https://github.com/jenssegers/laravel-mongodb/releases/tag/v3.3.0-alpha

We should test it out
 Comment 3: Now it is.
 Comment 4: Thanks 👏
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