Describe the bug

The credit cards should be located here:

src/locales/el/finance/credit_card/

but are located here:

src/locales/el/credit_card/

(This was not caused by us/our refactoring: https://github.com/faker-js/faker/blob/6.0.0-alpha.0/lib/locales/el/index.js#L6)

Reproduction

Try to use the greek ( el) credit card definitions using the default methods.

Additional Info

Discovered in #363

Do not fix before #363 is merged.