AWS supports the following Ruby runtimes:

<!--StartFragment-->
Name | Identifier | SDK for Ruby | Operating system
-- | -- | -- | --
Ruby 2.7 | ruby2.7 | 3.0.1 | Amazon Linux 2
Ruby 2.5 | ruby2.5 | 3.0.1 | Amazon Linux

<!--EndFragment-->

Currently, `localstack/lambda` only contains the `ruby2.5` tag. Will the 2.7 runtime be supported in the (near) future?
)
        stream_name = 'test-foobar'
        aws_stack.create_kinesis_stream(stream_name, delete=True)
        kinesis_connector.listen_to_kinesis(
            stream_name=stream_name,
            wait_until_started=True)
        kinesis = aws_stack.connect_to_service('kinesis')
        stream_summary = kinesis.describe_stream_summary(StreamName=stream_name)
        self.assertEqual(stream_summary['StreamDescriptionSummary']['OpenShardCount'], 1)
        num_events_kinesis = 10
        kinesis.put_records(Records=[
            {
                'Data': '{}',
                'PartitionKey': 'test_%s' % i
            } for i in range(0, num_events_kinesis)
        ], StreamName=stream_name)
        events = get_lambda_log_events(function_name)
        self.assertEqual(len(events[0]['Records']), 10)
        self.assertIn('eventID', events[0]['Records'][0])
        self.assertIn('eventSourceARN', events[0]['Records'][0])
        self.assertIn('eventSource', events[0]['Records'][0])
        self.assertIn('eventVersion', events[0]['Records'][0])
        self.assertIn('eventName', events[0]['Records'][0])
        self.assertIn('invokeIdentityArn', events[0]['Records'][0])
        self.assertIn('awsRegion', events[0]['Records'][0])
        self.assertIn('kinesis', events[0]['Records'][0])
    def test_function_concurrency(self):
        lambda_client = aws_stack.connect_to_service('lambda')
        function_name = 'lambda_func-{}'.format(short_uid())
        testutil.create_lambda_function(