Support for DynamoDB streams

[DannyRyman]

I have a requirement to be able to support streaming from both Kinesis and DynamoDB streams. Would it be possible to either a) refactor the code to support the injection of a DynamoDB provider or b) include a DynamoDB provider as a first class capability of the library?

I am happy submit a pull-request to get the ball rolling. If anyone has any guidance/suggestions on how best to structure the code to make this possible, I would be very interested.

There is currently the DynamoDB Streams Kinesis Adapter for the JVM.