With today's update this `serverless.yml` no longer deploys:

```yaml
service: "localtest"

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

functions:
  hello:
    handler: "handler.hello"
    events:
    - http:
        path: "/"
        method: "get"
        integration: "lambda-proxy"

plugins:
  - "serverless-localstack"

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

The error on the localstack end seems to be that it cannot create `ApiGateway::RestApi` type resources:
```
2019-10-24T09:10:41:DEBUG:localstack.utils.cloudformation.template_deployer: Deploying resource type "ApiGateway::RestApi" id "ApiGatewayRestApi"
2019-10-24T09:10:41:DEBUG:localstack.utils.cloudformation.template_deployer: Request for creating resource type "ApiGateway::RestApi": create_rest_api {'name': 'local-localtest'}
2019-10-24T09:10:41:ERROR:localstack.services.cloudformation.cloudformation_starter: Unable to parse and create resource "ApiGatewayRestApi": argument of type 'NoneType' is not iterable
```

This is followed by repeated `TypeError` and then `KeyError`.
self.assertEqual(json.loads(to_str(data_before)), data_after['event'])
        context = data_after['context']
        self.assertEqual('$LATEST', context['function_version'])
        self.assertEqual(lambda_name, context['function_name'])
        
        testutil.delete_lambda_function(lambda_name)
    def test_python_lambda_running_in_docker(self):
        if not use_docker():
            return
        zip_file = testutil.create_lambda_archive(
            load_file(TEST_LAMBDA_PYTHON3),
            get_content=True,
            libs=TEST_LAMBDA_LIBS,
            runtime=LAMBDA_RUNTIME_PYTHON36
        )
        testutil.create_lambda_function(
            func_name=TEST_LAMBDA_NAME_PY3,
            zip_file=zip_file,
            runtime=LAMBDA_RUNTIME_PYTHON36
        )
        result = self.lambda_client.invoke(
            FunctionName=TEST_LAMBDA_NAME_PY3, Payload=b'{}')
        result_data = result['Payload'].read()
        self.assertEqual(result['StatusCode'], 200)
        self.assertEqual(to_str(result_data).strip(), '{}')
        
        testutil.delete_lambda_function(TEST_LAMBDA_NAME_PY3)
class TestNodeJSRuntimes(LambdaTestBase):
    @classmethod
    def setUpClass(cls):