Country To Currency Versions Save

Fixes #24

Fixes #23

Fixes #22

Fixes #21

Fixes #16 and includes #17, #18, #19, and #20 by @jasongitmail

Fixes #14 about South Georgia

Adds two union types (TypeScript 3.4+ only):

• Currencies, that contains all the currencies;
• Countries, that contains all the countries.

Example - TypeScript on NodeJS:

  import countryToCurrency, { Currencies, Countries } from "country-to-currency";

Fixes #13 about El Salvador

• Output object's keys are now sorted

• Changes CH (Switzerland) to use CHF