This release requires Java 8 and above. Changes since rc1 are:
* Added support for Adder's. For example: await().untilAdder(myLongAdder, equalTo(5L))
* Added support for Accumulators's. For example: await().untilAccumulator(myLongAccumulator, equalTo(5L))
* Better handling of InterruptedException for Future's by using code from Guava (code from Uninterruptibles)
* Shutting down cleanup ExecutorService in an uninterruptible fashion
* Upgraded Kotlin extension to use Kotlin 1.3.50 (instead of 1.3.41)
Enjoy!