Promise.delay will not clearTimeout when cancelled

[yonjah]

Using bluebird 3.2.2
Similar to #926 with timeout When canceling a Promise.delay the internally used timeout is not cleared and the process will hang

var Promise = require('bluebird');
Promise.config({cancellation: true});

process.on('exit', function() {
  console.log(new Date(), 'Process exiting');
});

console.log(new Date(), 'Starting');
var delayPromise = Promise.delay(10000);

delayPromise.finally(function () {
    if (delayPromise.isCancelled()) {
        console.log(new Date(), 'Cancelled');
    }
});

setTimeout(function() {
    console.log(new Date(), 'Cancelling promise');
    delayPromise.cancel();
}, 1000);

Output -

Tue Feb 09 2016 05:17:03 GMT+0000 (UTC) 'Starting'
Tue Feb 09 2016 05:17:04 GMT+0000 (UTC) 'Canceling promise'
Tue Feb 09 2016 05:17:04 GMT+0000 (UTC) 'Cancelled'
Tue Feb 09 2016 05:17:13 GMT+0000 (UTC) 'Process exiting'

Notice the 10 seconds delay between the promise being canceled and the process exiting