Add options for visibility timeout and content based deduplication

[andremonteiro95]

We have run into some use cases where we need to manually set the visibility timeout and turn off content-based duplication, as such, we had the need to configure these directly in the serverless.yml.

[fredericbarthelet]

Hi @andremonteiro95, we discussed this PR earlier with @mnapoli and we came up with the idea illustrated in #191.

Because we don't want every construct to turn into something with hundreds of options, but also we don't want to limit users. WDYT?

[andremonteiro95]

Hi @fredericbarthelet, thanks for your reply.

I guess the first proposal is more in line with what Serverless already supports (resources.extensions).

Can you give me an example of how it would work with an SQS resource? I looked at the AWS Cloudformation Resource Reference table and I didn't find a reference for SQS, I don't know if you are relying on these.

[seantcanavan]

@fredericbarthelet is there any documentation on how to disable content based deduplication with #191?

EDIT: The documentation is located here https://github.com/getlift/lift/blob/master/docs/queue.md#extensions and here's the relevant code snippet for anyone else coming from google / github search:

constructs:
    my-queue:
        type: queue
        worker:
            handler: src/worker.handler
        extensions:
            queue:
                Properties:
                    ContentBasedDeduplication: false