Now you can specify more than one allowed (implicit) for a CLI option:
(defcli! (doom somecommand) ((foo ("--foo" (file int)))))
This will test FOO to ensure it is either an existing file path or an
integer. If neither is true, you'll see this helpful error:
Error: -o/--file received invalid value "FOO"
Validation errors:
- Not an integer.
- Not a valid path to an existing file.