Changed
* Upgraded prometheus_client to 0.2.x.
* Bumped pika to version 0.12. Because of this change, the ``interrupt`` method on `Broker` and its usages within `Worker` have been dropped.
* There is no longer a max message delay.
Fixed
* `Broker`s can now be passed an empty list of middleware. ([90])
* Potential stack overflow when restarting Consumer threads. ([89])
[90]: https://github.com/Bogdanp/dramatiq/issues/90
[89]: https://github.com/Bogdanp/dramatiq/issues/89