Feature - GetAndSet method with TTL support added RBucket, RBucketAsync, RBucketReactive, RBucketRx interfaces #1986

Shuffle the sentinel list so all clients don't prefer the same sentinel

Feature - addListener and removeListener methods added to RObject, RObjectAsync, RObjectReactive, RObjectRx objects. Allows to add and remove listeners for Deleted and Expired keyspace events published by Redis. #220

Feature - add getMultiLock, getRedLock methods to RedissonClient, RedissonRxClient and RedissonReactiveClient interfaces #1988

Fixed - ClassCastException during RBatchReactive and RBatchRx execution in exectionMode = REDIS_WRITE_ATOMIC or REDIS_READ_ATOMIC. #1661

Improvement - methods of RxJava2 interfaces should use full set of result objects: Single, Maybe or Completable #1912