Add flag emoji support for language keyword argument?

[jakewilliami]

E.g.,

spelled_out(1234, lang = 🇷🇺)
spelled_out(1234, lang = 🇺🇸)
spelled_out(1234, lang = 🇬🇧)
spelled_out(1234, lang = 🇪🇸)
spelled_out(1234, lang = 🇳🇿)
spelled_out(1234, lang = 🇧🇷)

(you get the idea).

Wouldn't be hard to implement, but would have to hard-code them (possibly goes against #30). Would just be a bit of fun 🤷‍♂️

[longemen3000]

yes!, i like it!, in the next PR it will be implemented

[jakewilliami]

This actually might be more difficult than imagined. I just tried implementing it but they may not be valid unicode characters in Julia.