AWS supports the following Ruby runtimes:

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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

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Currently, `localstack/lambda` only contains the `ruby2.5` tag. Will the 2.7 runtime be supported in the (near) future?
config.LAMBDA_FALLBACK_URL = url
    else:
        config.LAMBDA_FORWARD_URL = url
    try:
        result = []
        for i in range(num_requests):
            lambda_name = lambda_name or 'non-existing-lambda-%s' % i
            ctx = {'env': 'test'}
            tmp = lambda_client.invoke(FunctionName=lambda_name, Payload=b'{"foo":"bar"}',
                InvocationType='RequestResponse',
                ClientContext=to_str(base64.b64encode(to_bytes(json.dumps(ctx)))))
        result.append(tmp)
        return result
    finally:
        if fallback:
            config.LAMBDA_FALLBACK_URL = ''
        else:
            config.LAMBDA_FORWARD_URL = ''
class LambdaTestBase(unittest.TestCase):
    def test_create_lambda_function(self):
        func_name = 'lambda_func-{}'.format(short_uid())
        kms_key_arn = 'arn:aws:kms:us-east-1:000000000000:key11'
        vpc_config = {
            'SubnetIds': ['subnet-123456789'],
            'SecurityGroupIds': ['sg-123456789']
        }
        tags = {
            'env': 'testing'
        }
        kwargs = {