Brazil IBAN parsing rules

Examples

    iex>  %IbanEx.Iban{
    ...>    country_code: "BR",
    ...>    check_digits: "18",
    ...>    bank_code: "00360305",
    ...>    branch_code: "00001",
    ...>    account_number: "0009795493",
    ...>    national_check: "C1"
    ...>  }
    ...>  |> IbanEx.Country.BR.to_string()
    "BR 18 00360305 00001 0009795493 C1"