0.03 2017-11-13
- Support for passing parameters to task code
- Backward incompatible change: pipeline 'in' now expects list of (code, args
  array) or empty list to signal completion

0.02 2017-11-12
- Add Async::ProcessPool::Pipeline
- More thorough cleanup
- New method AnyEvent::ProcessPool->join
- 'workers' now defaults to number of cpus (threw an error previously)

0.01 2017-11-12
- Initial release