Automatically call `update` if `list` is old

[AllDmeat]

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

[tomassliz]

Did you try to call xcodes update? Because I see both of these Xcodes versions.

[AllDmeat]

That helped, thanks. Didn't even think I have to manually update the list to see new entries.

[tomassliz]

Great! I agree that it's not very ergonomic and easy to use - update at first and install afterwards.

[AllDmeat]

Have you considered auto-update when executing xcodes list?

[MattKiazyk]

@AllDmeat Updated the title and description to use this issue as a feature - to be smarter on when we update the list.