Allow options with no short versions about args

[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.

[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

[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!