Bosnia and Herzegovina IBAN parsing rules

Examples

    iex>  %IbanEx.Iban{
    ...>    country_code: "BA",
    ...>    check_digits: "39",
    ...>    bank_code: "129",
    ...>    branch_code: "007",
    ...>    national_check: "94",
    ...>    account_number: "94010284"
    ...>  }
    ...>  |> IbanEx.Country.BA.to_string()
    "BA 39 129 007 94010284 94"