This library now supports AWS SDK 3.0 as an injectable library.
To run the feature tests, you need to set up an actual Dynamodb table within AWS and then call cucumber lik the following:
npm run feature-tests -- --world-parameters '{"awsRegion":"YOUR_REGION", "testTable":"YOUR_TEST_TABLE"}'
IMPORTANT WORD OF CAUTION: I would not attempt to use this table for anything other than this feature tests, as the table is completely deleted without remorse.