Exposed the serializable-model when generating client models.

[denvitaharen]

Many thanks for submitting your Pull Request ❤️!

Issue: #869

Exposed the possibility to generate models that implement the java.io.Serilizable-interface. I changed the property from the proposed serializableModel to serializable-model since I thought it harmonized better with the naming of the other configurations.

I wrote an new test module for this, maybe it was a bit over engineered, but I didn't find any existing suitable test to put this in, so I did a new module instead.

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[denvitaharen]

My bad, I had set IntelliJ to optimize imports and reformat code, which changed everything the verify had made. Rerunned it now and made sured IntelliJ didn't change anything.

[hbelmiro]

Thank you @denvitaharen.
Looks great in general. I just left a few minor comments.

[denvitaharen]

Thanks for the comments @hbelmiro! I have updated the PR based on your feedback.

Out of curiosity, why isn't star imports ok? I don't have any personal preferences, I just use what's default in my IDE and have never reflected or hade any problems with star imports :)

[hbelmiro]

Thanks for the comments @hbelmiro! I have updated the PR based on your feedback.

Out of curiosity, why isn't star imports ok? I don't have any personal preferences, I just use what's default in my IDE and have never reflected or hade any problems with star imports :)

@denvitaharen star imports don't bring any benefits, but some disadvantages:

• Reduce readability since it's unclear which package a class comes from
• Reduce code maintainability: future changes in dependencies or new class additions to imported packages might introduce conflicts or ambiguities