Cldr Currencies version 2.17.2

Bug Fixes

• Cldr.Currency.currency_for_code/3 no longer returns {:ok, nil} when a valid currency has no localized data in the requested locale. It now returns {:error, {Cldr.CurrencyNotLocalized, _}}. Pass fallback: true to walk the CLDR locale fallback chain (and the backend's default locale) before failing. Thanks to @neilberkman for the report. Closes #19.

Enhancements

• Fix doctest code example formats. Thanks to @princemaple for the PR.