Properly implement aggregate root versioning

[driesvints]

We'll need to properly implement versioning in the database table and retrieve it from the last record in the retrieveAll method of the LaravelMessageRepository and also implement the retrieveAllAfterVersion method.

[sandervanhooft]

@driesvints do you have some specific ideas on this?

[sandervanhooft]

Version would be just an (not auto) incrementing int right?

[driesvints]

@sandervanhooft it's been quite a while since I worked on the library and probably won't have time to check into this soon, sorry. I still plan on working on it eventually but don't know when I'll get to it.

[sandervanhooft]

No problem!

And I yet have to encounter my first concurrency issue with this.