title: GraphQL update multiple statusses
body: <p>For my project I need to update the status for all posts where the status is currently 1. </p>
  
  <p>I've been trying to find a way to create a condition based mutation, or maybe even put multiple mutations in one request (though this has the disadvantage that I need to have the id's of all posts with status = 1 in advance.</p>
  
  <p>Can't seem to find any solution beside mutating every item individually, which seems extremely inefficient to me.</p>