Version is broken

[kytrinyx]

Right now if you say exercism --version it outputs the entire usage message.

This changed in f999e69

    disambiguate debug and verbose flags

    The debug boolean flag and the debug command were ambiguous. Changing
    the `debug` boolean flag to `verbose` makes which options you're
    referring to more obvious.

@lcowell You deliberately added the app.HideVersion here. Is it safe to take it back off?

I'm thinking this would make sense:

--version, v
--verbose # no shorthand

[Tonkpils]

We had talked about this when the --verbose was originally implemented and we said it would be good to have --v shorthand for verbose. However, --v was later removed because of conflicts with the CLI package. I think it makes sense for the --v to simply be part of version.

[kytrinyx]

I agree. If you're going to be verbose, it's kind of poetic justice that you have to type out the whole flag name.