[Suggestion] Simplified data

[LKay]

Currently the module returns complete data based on countries.json, but often the flags or countries names are not necessary.

For the purpose of smaller footprint , would it be possible to export a data ie.:

import minData from 'countries-phone-masks/min'

That would only contain:

interface CountryMin {
  code: string;
  iso: string;
  mask: string;
}