0.19.2

• Fixed ArrayBroadcastChannel receive of stale elements on openSubscription. Only elements that are sent after invocation of openSubscription are received now.
• Added a default value for context parameter to rxFlowable (see PR #146 by @PhilGlass).
• Exception propagation logic from cancelled coroutines is adjusted (see #152):
  • When cancelled coroutine crashes due to some other exception, this other exception becomes the cancellation reason of the coroutine, while the original cancellation reason is suppressed.
  • UnexpectedCoroutineException is no longer used to report those cases as is removed.
  • This fixes a race between crash of CPU-consuming coroutine and cancellation which resulted in an unhandled exception and lead to crashes on Android.
• run uses cancelling state & propagates exceptions when cancelled (see #147):
  • When coroutine that was switched into a different dispatcher using run is cancelled, the run invocation does not complete immediately, but waits until the body completes.
  • If the body completes with exception, then this exception is propagated.
• No Job in newSingleThreadContext and newFixedThreadPoolContext anymore (see #149, #151):
  • This resolves the common issue of using run(ctx) where ctx comes from either newSingleThreadContext or newFixedThreadPoolContext invocation. They both used to return a combination of dispatcher + job, and this job was overriding the parent job, thus preventing propagation of cancellation. Not anymore.
  • ThreadPoolDispatcher class is now public and is the result type for both functions. It has the close method to release the thread pool.