Allow access to Job#queue

[bogdan]

I was surprised that Job#queue property is protected.

https://github.com/taskforcesh/bullmq/blob/master/src/classes/job.ts#L107

That is the limitation the doesn't allow some abstraction code around the job like:

const cloneJob = (job: Job) => {
  job.queue.add(job.name, job.data)
}

Is it possible to make Job#queue property public?

[manast]

It is easy to workaround this issue by just extending the Queue class...