Allow options with no short versions

[slorber]

Hi,

If there is already a short version with a given letter, I think next options starting with same letter should not expose a short version at all.

Here I'm trying to create a list PR and my --cors options conflits with the --cache option:

    -c, --cache <n>    How long static files should be cached in the browser (seconds)
    -c, --cors <list>  Setup * CORS headers to allow requests from any origin

As far as I understand, I can't setup no short version at all or a short version of more than 1 letter. It means there can't be more than 26 options available and I have to pick a random letter for my cors options

[Siilwyn]

How about implementing it like this flipping the order:
passed in > resulting flags
'something' > 'something' and 's'
['something'] > 'something'
['something', 'a'] > 'something' and 'a'

The module will check if it's an array, take the first one as the option flag. Then if there is a second element use that for the alias.

[leo]

I will check if there's already a flag with said short version and then not use a short version, assuming that it's the case.

[leo]

Released a cool fix!

[DRSDavidSoft]

Has this behavior been changed?

option(['long'], 'do the thing')       // → Short version of option is longer than 1 char
option(['s', 'long'], 'do the thing')  // → -s, --long
option(['s'], 'do the thing')          // → -s, --undefined
option(['', 'long'], 'do the thing')   // → -, --long
option([null, 'long'], 'do the thing') // → Cannot read property 'length' of null