Ability to stop parsing flags when -- is passed in #241
Description
Is your feature request related to a problem?
I'd like to be able to stop parsing flags, so I'd be able to do stuff like my-cmd foo bar -- --baz and they'd all be passed as positional arguments.
Describe the solution you'd like
As I've said, "--" passed as an argument should mean to not parse any more non-positional arguments.
Describe alternatives you've considered
There's no alternative solution that I've found within the current argh framework.
Additional context
This is canonical from GNU/POSIX getopt.