The display order of the Xcode version list is disordered and some duplicated

[wangzhizhou]

when use the command xcodes list, there are two problem about the order and duplicate of the xcode version list:

The disordered versions:

The duplicated versions:

[wangzhizhou]

@MattKiazyk Is this problem should be fixed for xcodes cli? and I create a PR to resolve this problems.