(WIP) V3

[ravanscafi]

To-do

• [x] Update mongolid version
• [x] Update tests style
• [X] Drop localMock on Model (and also shouldReceiveSave, shouldReceiveDelete)
• [x] Close mockery expectations for static access of models?
• [x] Namespace based on Mongolid\
• [x] Integration tests
• [X] Add to PHP libraries (see https://github.com/mongodb/docs-ecosystem/pull/463)
• [x] Suggest dependent packages
• [x] Update Readme
• [ ] Migration helpers (e.g. create index, rename collection, change __pclass)
• [ ] New documentation

Dependent Packages

• [x] Mongolid Passport (see https://github.com/leroy-merlin-br/mongolid-passport/pull/12)
• [ ] Confide Mongo

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Depends on https://github.com/leroy-merlin-br/mongolid/pull/133