[BUG] handles AttributeError in show_versions() when dependency lacks __version__

[yarnabrina]

Closes #5788

[fkiraly]

Thanks, this looks like it would work.

I would appreciate an explanation, can you confirm: the idea is that get_version will now never result in an exception, therefore we move it out of the try/except statement.

Further, it would be appreciated if you could make the same change in scikit-base, ultimately it makes sense to refactor the logic to be located there.

[yarnabrina]

the idea is that get_version will now never result in an exception, therefore we move it out of the try/except statement.

Right, confirmed.