Feature idea: 1:1 mapping of code to native name

[ragesoss]

I tried this gem out briefly for use in a language switcher widget, where I want to take a list of available locales — the language codes from 639-1 or 639-2 — and turn it into a select widget with all the native names of the languages.

I was hoping for a method to get that directly, like:

ISO_639.find_native_name('am') # => 'አማርኛ'

The iso-639-1 npm module does something similar.