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`.
'LocalSecondaryIndexes': 'LocalSecondaryIndexes',
                'GlobalSecondaryIndexes': 'GlobalSecondaryIndexes',
                'StreamSpecification': lambda params, **kwargs: (
                    common.merge_dicts(params.get('StreamSpecification'), {'StreamEnabled': True}, default=None))
            },
            'defaults': {
                'ProvisionedThroughput': {
                    'ReadCapacityUnits': 5,
                    'WriteCapacityUnits': 5
                }
            }
        }
    },
    'Events::Rule': {
        'create': [{
            'function': 'put_rule',
            'parameters': {
                'Name': PLACEHOLDER_RESOURCE_NAME,
                'ScheduleExpression': 'ScheduleExpression',
                'EventPattern': 'EventPattern',
                'State': 'State',
                'Description': 'Description'
            }
        }, {
            'function': 'put_targets',
            'parameters': {
                'Rule': PLACEHOLDER_RESOURCE_NAME,
                'EventBusName': 'EventBusName',
                'Targets': 'Targets'
            }