Costa Rica IBAN parsing rules

Examples

    iex>  %IbanEx.Iban{
    ...>    country_code: "CR",
    ...>    check_digits: "05",
    ...>    bank_code: "0152",
    ...>    branch_code: nil,
    ...>    account_number: "02001026284066",
    ...>    national_check: nil
    ...>  }
    ...>  |> IbanEx.Country.CR.to_string()
    "CR 05 0152 02001026284066"