def raw_exchange_rates
      table_rows = Oga.parse_html(response.body).css('.row.row-wrapper')
      # EGB porvide 17 currencies (and a header row)
      fail ResponseError, 'Unknown HTML' unless table_rows&.size == 18
      table_rows.lazy.drop(1).map(&:children).map do |cell|
        cell.map(&:text).map(&:strip)
      end
    end
def raw_exchange_rates
      table_rows = Oga.parse_html(response.body).css('.row.row-wrapper')
      # EGB porvide 17 currencies (and a header row)
      fail ResponseError, 'Unknown HTML' unless table_rows&.size == 18
      table_rows.lazy.drop(1).map(&:children).map do |cell|
        cell.map(&:text).map(&:strip)
      end
    end
Send the request to the URL and retrun raw data of the response
 @return [Enumerator::Lazy] with the table row in HTML that evaluates to
   [
     ["", "USD", "", "17.00", "", "17.75", ""],
     ["", "EUR", "", "17.9639", "", "18.8896", ""],
     ["", "GBP", "", "20.9049", "", "22.0739", ""],
     ...
   ]