[Feature/Idea]: Support lowercase -v for version when no subcommand is supplied

[aaronliu0130]

What would you like to see changed/added?

Currently, if no subcommand is provided and one types -v, they get an error, as the version switch is now -V. This change feels like it has no use: it's not like you can combine it with another subcommand either. I propose to eliminate the -V switch and replace it with -v only in the case where

[russellbanks]

Clap, the library Komac uses for command line argument parsing, defaults to -V rather than -v to not conflict with the common usage of -v being a verbose flag - clap-rs/clap#138. As Komac doesn't use a verbose flag, I can override it so that -v, -V and --version are all valid options.