Xcodes currently automatically updates when list is called only when it doesn't have the list already

https://github.com/RobotsAndPencils/xcodes/blob/main/Sources/XcodesKit/XcodeList.swift#L16

This should be smarter, and be updated so that if the latest availableXcodes is older then 24 hours, automatically update itself.

Original request below:

version 0.20.0