title: Timestamps are not updating while attaching data in pivot table
body: <p>I'm creating a row in pivot table using the following attach statement. </p>
  
  <pre><code>$music = Music::find(1);
  $music-&gt;users()-&gt;attach(1);
  </code></pre>
  
  <p>This inserting a row in pivot table but, It is not updating the timestamp. The timestamp remains 0000-00-00 00:00:00</p>
  
  <p>Is there any way to update the timestamps in pivot table. ?</p>
  
  <p>Thanks in advance,</p>