title: outline border not working in laravel excel
body: <p>In laravel excel I used outline border for table but it not work proper for merged cell.Outline border missing where cell merged in table.</p>
  
  <pre><code>$cellStyle = array(
    'borders' =&gt; array(
      'outline' =&gt; array(
        'style' =&gt; PHPExcel_Style_Border::BORDER_THICK
      )
    )
  );
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/Lc9Q5.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Lc9Q5.png" alt="enter image description here"></a></p>