title: jspdf is coloring the first row and header
body: <p>I am trying to color only the first row , It is working well but the problem it is coloring the header also in the same time,
  Do anyone has an idea?
  I am using jspdf
  This is the snippet code</p>
  <pre><code>if (new Date(tableaudate[0]).getDay() === 0) {
            if (data.row.index === 0) {
              data.cell.styles.fillColor = [211, 211, 211];
              console.log(data);
            }
          }
  </code></pre>
  <p>I have added this piece of code after in order to overwrite any style but it is not working :</p>
  <pre><code>options.headStyles = {
        fillColor: [23, 55, 100],
        textColor: '#FFFFFF',
        minCellHeight: 8,
        fontSize: 8
      };
  </code></pre>
  <p>It is applying the style of the first row in the header.
  Please do anyone has an idea about this problem?</p>