In preparation for upcoming work, we've made a couple future-proofing

changes for PatchAuthor and PatchResult.
Both classes now take keyword-only arguments, rather than positional

arguments. Callers can continue to pass in positional arguments for now,

but this is deprecated and will be removed in RBTools 7. The RBTools

codebase already passes in all arguments as keywords.
They also now provide type hints for the attributes and the constructor

methods.

Unit tests pass.