New Feature : Allow for array in flag options

[elmatou]

Would be really usefull if options could take a list of values
currently if I need to pass a list of value for a given option I have to repeat the flag :

bin -a fr -a be -a us
# will return { ..... a: ['fr', 'be', 'us'] }

What if we could parse :

bin -a fr,be,us
# and return { ..... a: ['fr', 'be', 'us'] }

of course there will be a debate on the separator, which should be an option.
This behavior could be trigger with the array option, if a separator option is provided.

just check this :

"a,z,e,r,t".split(undefined) // Array [ "a,z,e,r,t" ]
"a,z,e,r,t".split(',') // Array(5) [ "a", "z", "e", "r", "t" ]

Anybody interested in this ?