Unshield doesn't recognize --version

Steps to reproduce: unshield --version

Expected result: unshield 1.4.3, MIT License, https://github.com/twogood/unshield

Actual result:

unshield: invalid option -- '-'
Syntax:

    unshield [-c COMPONENT] [-d DIRECTORY] [-D LEVEL] [-g GROUP] [-i VERSION] [-e ENCODING] [-GhlOrV] c|g|l|t|x CABFILE [FILENAME...]

Options:
    -c COMPONENT  Only list/extract this component
    -d DIRECTORY  Extract files to DIRECTORY
    -D LEVEL      Set debug log level
                    0 - No logging (default)
                    1 - Errors only
                    2 - Errors and warnings
                    3 - Errors, warnings and debug messages
    -g GROUP      Only list/extract this file group
    -h            Show this help message
    -i VERSION    Force InstallShield version number (don't autodetect)
    -e ENCODING   Convert filename character encoding to local codepage from ENCODING (implicitly sets -R)
    -j            Junk paths (do not make directories)
    -L            Make file and directory names lowercase
    -O            Use old compression
    -r            Save raw data (do not decompress)
    -R            Don't do any conversion to file and directory names when extracting.
    -V            Print copyright and version information

Commands:
    c             List components
    g             List file groups
    l             List files
    t             Test files
    x             Extract files

Other:
    CABFILE       The file to list or extract contents of
    FILENAME...   Optionally specify names of specific files to extract (wildcards are supported)

twogood / unshield

Unshield doesn't recognize --version #101