Release v2.2.0

What's Changed

• feat(pool): add option to bound task queue (v2) by @alitto in #99
  • Add support to create bounded pools by specifying a queue size (WithQueueSize option).
  • Add support to choose how to deal with tasks submitted when the queue is full (WithNonBlocking option).
  • Ensure RunningWorkers() method in subpools reflect the actual number of workers running tasks belonging to the subpool.
  • Allow overriding pool options when creating a subpool via NewSupool.
  • Simplify pool submission logic and remove dispatcher goroutine.
  • Simplify subpool implementation.

Full Changelog: v2.1.6...v2.2.0