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?
self.assertDictEqual(json.load(result_data), vars)
        
        result = self.lambda_client.get_function_configuration(
            FunctionName=TEST_LAMBDA_NAME_ENV)
        self.assertEqual(result['Environment'], {'Variables': vars})
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_ENV)
    def test_invocation_with_qualifier(self):
        lambda_name = 'test_lambda_%s' % short_uid()
        bucket_name = 'test-bucket-lambda2'
        bucket_key = 'test_lambda.zip'
        
        zip_file = testutil.create_lambda_archive(
            load_file(TEST_LAMBDA_PYTHON), get_content=True,
            libs=TEST_LAMBDA_LIBS, runtime=LAMBDA_RUNTIME_PYTHON27)
        self.s3_client.create_bucket(Bucket=bucket_name)
        self.s3_client.upload_fileobj(
            BytesIO(zip_file), bucket_name, bucket_key)
        
        response = self.lambda_client.create_function(
            FunctionName=lambda_name, Runtime=LAMBDA_RUNTIME_PYTHON27, Role='r1', Publish=True,
            Handler='handler.handler', Code={'S3Bucket': bucket_name, 'S3Key': bucket_key}
        )
        self.assertIn('Version', response)
        
        data_before = b'{"foo": "bar with \'quotes\\""}'
        result = self.lambda_client.invoke(
            FunctionName=lambda_name,
            Payload=data_before,
            Qualifier=response['Version']