devel/py-rq: Updated to 1.11.1

Changes:

• queue.enqueue_many() now supports on_success and on on_failure arguments.
• You can now pass enqueue_at_front to Dependency() objects to put dependent jobs at the front when they are enqueued.
• Fixed a bug where workers may wrongly acquire scheduler locks.
• Jobs should not be enqueued if any one of it's dependencies is canceled.
• Fixed a bug when handling jobs that have been stopped.
• Fixed a bug in handling Redis connections that don't allow SETNAME command.