Upgrade bullmq and implement more advanced queue/job features

[joshmanders]

We need to bring BullMQ up to latest version, and implement more advanced queue/job features like methods in the Job class for chaining on dispatch for changing what connection that job should dispatch to.

ExampleJob.dispatch({ ... }).on('other-connection');

Also things for controlling the job when dispatching like setting default config on the job class itself, and overriding those with a second param on the Job#dispatch(payload, options) method.