Adds creation of dlq from resources

[JeisonJHA]

It adds support for creation of dlq from resources, but only with one format :(

      RedrivePolicy:
        deadLetterTargetArn: # Support only this format for autoCreate
          Fn::GetAtt:
          - MyFourthQueueDlq
          - Arn
        maxReceiveCount: 6

I think it solves #65 partially

[katesclau]

This CI is failing for

serverless-offline-plugins-integration: toomanyrequests: You have reached your pull rate limit. You may increase the limit by authenticating and upgrading: https://www.docker.com/increase-rate-limit

Code looks good though 👍

[luisdemarchi]

wowww @katesclau @katesclau this feature is valuable, what needs to be approved and merged?

[CodySearsOS]

Running into this issue with version 7.3.2 when I have a DLQ specified. Figured I'd add a comment to bump in case others are seeing it as well