Comptime code path of GTK version atLeast() function fails to take preceding segment into account

[iainh]

The current implementation of the comptime GTK version atLeast() function fails to take the higher order version segments into account when comparing versions. For example, when Ghostty is compiled against a GTK 4.17.1 version.atLeast(4,16,2) will return false due to the micro versions.

I opened pull request #3977 as a fix so I'm hoping to get this moved to an issue so I can update the pull request.