respect convert_to_snake_case settings

[Rosswell]

fixes #275 by passing the convert_to_snake_case to various generators created via the get_package_generator function.

adds a test that attempts to test that all the generator class fields that are determined by data passed in from ClientSettings are respected.

tested both via unit tests and by regenerating code in which i experienced this issue myself

[Rosswell]

@rafalp would you be able to take a look at this whenever you get a chance? very minor change

[rafalp]

Hi @Rosswell, @DamianCzajkowski is the man you want.

I am no longer with Mirumee and I have no powers here anymore :D

[DamianCzajkowski]

Hi @Rosswell, could you add a changelog entry?

[Rosswell]

@DamianCzajkowski done!

[DamianCzajkowski]

I've checked it, and it looks fine. Just some linters failed, so after you resolve them, I will merge it and deploy a new version.

[Rosswell]

@DamianCzajkowski fixed :)

[McleanWorkshield]

Appreciate this feature - it solved my problem!

I look forward to it being deployed. In the mean time I successfully got it from git.

I think the default feature is still broken though - Generated code works fine with the snake case. It breaks when trying to get nested properties.

Either way thanks!!