[Feature Request] Add the opposite option to reservedNames (forceTransformProperties?)

OK, `renameProperties` is dangerous and it can break the code. With `reservedNames` it is possible to prevent some properties from being touched. So what about we provide a list and only the prop name in the list should be renamed?

In short, besides a blacklist (`reservedNames`), I'd like to have a whitelist as well.

The issue names no files, tests, or entry points. Start by locating the existing reservedNames and renameProperties option handling, then trace property-renaming behavior; done means a whitelist equivalent is applied consistently without changing blacklist behavior.

Written by the indexing model from the issue text.