title: get update value after an updateOne()
body: <p>is it possible to get all updated value/value where there is a diff after a call of updateOne()</p>
  
  <pre><code> _.each(gameResult, function(gameResult){
      bulk.find({"user" : gameResult.user, "section" : gameResult.section , "code" : gameResult.code}).upsert().updateOne(gameResult);
    })
  </code></pre>
  
  <p>imagine my value in the db before the update are :</p>
  
  <pre><code>1, 1, 1, 1
  </code></pre>
  
  <p>gameResult is :</p>
  
  <pre><code>1, 2, 1 , 3
  </code></pre>
  
  <p>So my db is updated :     1, 2, 1, 3</p>
  
  <p>Is it possible to get all value who are changed, so here how can i get my two object 2 and 3 cause i need it in the code. </p>