Honduras IBAN parsing rules

Examples

    iex>  %IbanEx.Iban{
    ...>    country_code: "HN",
    ...>    check_digits: "88",
    ...>    bank_code: "CABF",
    ...>    account_number: "00000000000250005469"
    ...>  }
    ...>  |> IbanEx.Country.HN.to_string()
    "HN 88 CABF 00000000000250005469"