Use different line numbers in rule type_body_length for subtypes

[Jeehut]

We would like to specify different line numbers to the type_body_length rule when it comes to subtypes in comparison to types. This could either be done by providing an option to the existing rule type_body_length or by creating a new rule named subtype_body_length.

Specifically, we would like to keep the SwiftLint default warnings and error values for type_body_length (which are set at 200 and 350 right now) but we would like to limit the length of subtypey to 20 (warning) and 35 (error).

I would be happy to implement this myself, but which of the two above ways do you think makes more sense? I'm guessing introducing a new rule will be the easier solution. Do you agree?

[marcelofabri]

I think having it as a separate rule would be easier to understand as a SwiftLint user.

[jslusser]

I agree - keep it separate