The following example `serverless.yml` fails to deploy on localstack:

```yaml
service: "localtest"

provider:
  name: "aws"
  runtime: "nodejs10.x"

functions:
  hello:
    handler: "handler.hello"
    
resources:
  Resources:
    ApiGatewayRestApi:
      Type: "AWS::ApiGateway::RestApi"
      Properties:
        Name: "${self:provider.stage}-${self:service}"
    GatewayResponseDefault400:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "DEFAULT_4XX"
        ResponseTemplates:
          application/json: '{"errors":[{"message":"Custom text."}]}'
    GatewayResponseUnauthorized:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "UNAUTHORIZED"
        ResponseTemplates:
          application/json: '{"errors":[{"message":"Custom text!", "extra":"Some extra info"}]}'
    GatewayResponseDefault500:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "DEFAULT_5XX"
        ResponseTemplates:
          application/json: '{"errors":[{"message":$context.error.messageString}]}'
    GatewayResponseIntegrationTimeout:
      Type: "AWS::ApiGateway::GatewayResponse"
      Properties:
        RestApiId:
          Ref: "ApiGatewayRestApi"
        ResponseType: "INTEGRATION_TIMEOUT"
        ResponseTemplates:
          application/json: '{"errors":[{"message":$context.error.messageString}]}'

plugins:
- "serverless-localstack"

custom:
  localstack:
    stages:
      - "local"
```

The error on the localstack end is `Exception: CloudFormation deployment for resource type ApiGateway::GatewayResponse not yet implemented`.
stack = get_stack_details(TEST_STACK_NAME)
            self.assertEqual(stack['StackStatus'], 'CREATE_COMPLETE')
        retry(check_stack, retries=3, sleep=2)
        
        assert bucket_exists('cf-test-bucket-1')
        
        assert queue_exists('cf-test-queue-1')
        
        assert topic_exists('cf-test-topic-1-1')
        
        assert stream_exists('cf-test-stream-1')
        
        resource = describe_stack_resource(TEST_STACK_NAME, 'SQSQueueNoNameProperty')
        assert queue_exists(resource['PhysicalResourceId'])
        
        tags = s3.get_bucket_tagging(Bucket='cf-test-bucket-1')['TagSet']
        self.assertEqual(tags, [{'Key': 'foobar', 'Value': aws_stack.get_sqs_queue_url('cf-test-queue-1')}])
        
        subs = sns.list_subscriptions()['Subscriptions']
        subs = [s for s in subs if (':%s:cf-test-queue-1' % TEST_AWS_ACCOUNT_ID) in s['Endpoint']]
        self.assertEqual(len(subs), 1)
        self.assertIn(':%s:cf-test-topic-1-1' % TEST_AWS_ACCOUNT_ID, subs[0]['TopicArn'])
    def test_list_stack_events(self):