Renaming apply

[zoewangg]

Renaming apply() to make it more kotlin friendly.

• SdkBuilder.apply -> SdkBuilder.applyMutation
• ResponseTransformer.apply -> ResponseTransformer.transform

[kiiadi]

I get that applyMutator describes exactly what you're doing - you're applying a mutator to the builder - but I'd prefer to name it based the desired outcome rather than how you're doing it. You want to update the builder or mutate it. I think they're better options - alternatively if you want to keep the apply verb in the method name for discoverability purposes then applyMutation or applyChange.