title: Aggregation issue with Mongo 3.6
body: <p>I was using the aggregate function without any problem connecting a 3.4 mongodb. </p>
  
  <p>When I change to a 3.6 db, </p>
  
  <p>I've got the message: <strong>The 'cursor' option is required, except for aggregate with the explain argument.</strong> </p>
  
  <p>Sorry if it's already posted. I am unable to find any solutions</p>