dynamodb-streams-kinesis-adapter still depends on the AWS SDK v1

[julienrf]

still depends on the AWS SDK v1 whereas all our other dependencies use SDK v2.

Consequently, we have to handle both SDKs in our codebase (sometimes converting data from one version to the other version).

There seems to be no newer version of the library that uses the SDK v2, but according to this discussion it could be possible to stream item changes directly to Kinesis streams without any adapters.