Should promisified function return rejected promise when done is not called, but returns a non Promise value

[tunnckoCore]

e.g.

var fn = redolent(function (done) {
  return 'foo bar'
})

fn().catch(function (err) {
  console.log(err)
})

It can only return a Promise or undefined, or call the callback.

in these cases it not rejects

var fn = redolent(function (done) {
  return
})

var fn = redolent(function (done) {
  return undefined
})