https://github.com/jackocnr/intl-tel-input/ has updated the flag list. They are sourced from https://github.com/behdad/region-flags

I have used the css from jackocnr's site to place the sprite correctly. He has changed the sprite to a very very wide image instead of the rectangular one we use. The best approach would be to keep an automated tab on https://github.com/behdad/region-flags repo and rebuild the sprite automatically. Or at least, get a notification about a change.