Kosovo doesn't define as a country code

[shakedoron]

Hi, I used the validator in my code for validating the country code (iso3166_1_alpha2).
The validation failed when I tried to enter Kosovo (XK) as an input. I saw that you don't support this country. Can you add this country to your code?

Thanks!

[rebel-l]

I think this issue can be closed as the PR is merged to master