job.returnvalue not populated in 3.0.0-rc.2

Created by: gswalden

After upgrading to 3.0.0-rc.2, I noticed the returnvalue property is no longer populated. See these two demonstrations.

const Queue = require('bull');

const doneQueue = new Queue('testing callback');
function doneResult(id) {
  setTimeout(function() {
    doneQueue.getJobFromId(id).then(job => {
      console.log('callback job returnvalue', job.returnvalue);
    })
  }, 1000)
}
doneQueue.process((job, done) => {
  doneResult(job.id);
  done(null, 'callback result string');
})
doneQueue.add({ testing: true });

const Queue = require('bull');
const promiseQueue = new Queue('testing promise');
function promiseResult(id) {
  setTimeout(function () {
    promiseQueue.getJobFromId(id).then(job => {
      console.log('promise job returnvalue', job.returnvalue);
    })
  }, 1000)
}
promiseQueue.process(job => {
  promiseResult(job.id);
  return Promise.resolve('promise result string');
})
promiseQueue.add({ testing: true });

Upon inspecting the job object returned from getJobFromId(), I did not see any new properties containing the string I passed to done().