Saudi Arabia IBAN parsing rules

Examples

    iex>  %IbanEx.Iban{
    ...>    country_code: "SA",
    ...>    check_digits: "03",
    ...>    bank_code: "80",
    ...>    branch_code: nil,
    ...>    national_check: nil,
    ...>    account_number: "000000608010167519"
    ...>  }
    ...>  |> IbanEx.Country.SA.to_string()
    "SA 03 80 000000608010167519"