could we add label prop?

[yingjun]

Hi thanks for this handy package.
is it possible add label prop so that user can customize the display label? current it is display country code, if we need display something else there is no way do it. thanks for considering.

[ubaldop]

Thank you for the suggestion, it might be interesting. Where do you expect the label? Probably it could be better to have it at the bottom of the flag. What do you think?