v2.3.4.RELEASE

Change log:

10d4652 Upgrade dependencies; prepare for release
8a959d0 Fix example in README for AdjacentParentShardId
2b25b7e GH-177: Checkpoint closed shards for Kinesis
5a3c6a1 GH-179: Kinesis: Add "shards to consume" filter
c53bdfb GH-175: Iterate listShards() pages
ee79a1c GH-173: Use DEFAULT_DDB_BILLING_MODE instead of null