title: Projection not working as expected in mongodb npm version 3.1.8
body: <pre><code> const data = await req.db.collection('Collection').find({},{'key1':1,'key2':1,'key3':1}).toArray();
  </code></pre>
  
  <p>Isn't the above query supposed to give the documents with key1,key2 and key3?? Instead it showing me the complete information from the documents?</p>