code: def raw_exchange_rates
        table_rows = Oga.parse_html(response.body).css('.tableHolder').first
        table_rows = table_rows&.css('tr')
        # Blom porvide 14 currencies on the home page (and 2 <th>)
        fail ResponseError, 'Unknown HTML' unless table_rows&.size == 16
        table_rows.lazy.drop(2).map(&:children).map do |row|
          row.map(&:text).map(&:strip)
        end
      end
docs: 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   02", "", "", "", ..., "17.0000", "", "17.7500", ""]
       ["", "EURO  30", "", "", "", ..., "17.9690", "", "18.8896", ""]
       ...
     ]