Unable to report version

[raxod502]

When attempting to retrieve the currently installed version of Jumpapp, I receive an error message:

% jumpapp --version
/usr/bin/jumpapp: illegal option -- -
/usr/bin/jumpapp: illegal option -- v
/usr/bin/jumpapp: illegal option -- e
/usr/bin/jumpapp: illegal option -- s
Usage: jumpapp [OPTION]... COMMAND [ARG]...

Jump to (focus) the existing window for an application, if it's running.
Otherwise, launch COMMAND (with opitonal ARGs) to start the application.

Options:
  -r -- cycle through windows in reverse order
  -f -- force COMMAND to launch if process found but no windows found
  -m -- if a single window is already open and in focus - minimize it
  -n -- do not fork into background when launching COMMAND
  -p -- always launch COMMAND when ARGs passed
        (see Argument Passthrough in man page)
  -L -- list matching windows for COMMAND and quit
  -t NAME -- process window has to have NAME as the window title
  -c NAME -- find window using NAME as WM_CLASS (instead of COMMAND)
  -i NAME -- find process using NAME as the command name (instead of COMMAND)
  -w -- only find the applications in the current workspace
  -R -- bring the application to the current workspace when raising
        (the default behaviour is to switch to the workspace that the
        application is currently on)
  -C -- center cursor when raising application

I think it would be an improvement if the current version number were printed instead.

[mkropat]

This is a good idea. If I find some time I'll do it.