--version not matching GNU standards

[rzr]

According to GNU standards:

The standard --version option should direct the program to print information about its name, version, origin and legal status, all on standard output, and then exit successfully.

https://www.gnu.org/prep/standards/standards.html#g_t_002d_002dversion

Currently exit code is 1, I can provide a fix if desired.

[ralight]

Thanks, I've pushed a fix for this.