The default version command.
It adds the options “-v” and “–version” to the CommandParser#main_options
but this can be changed in ::new.
When the command is specified on the command line (or one of the above
mentioned options), it shows the version of the program configured by the
Create a new version command.
Specifies whether the '-v' and '–version' switches should
be added to the CommandParser#main_options