Prefer property decorator to explicit call

[jaraco]

This is a feature request for pyupgrade.

Prior to Python 2.4, it wasn't possible to use decorators, so properties were had to be implemented in a two-step process. I recently stumbled onto such code and had hopes pyupgrade would automatically fix that usage, but alas, it did not. It would be nice if pyupgrade could support upgrading that syntax.

Even better would be if it could also upgrade the setter syntax and maybe others (I don't think I've ever used a deleter).

Given the age of Python 2.3 compatible code, it may not be worthwhile implementing this upgrade, but I thought I'd register the concern.