Feature: Option worker definition optionally as string reference.

[jiw-mh]

This is a stab at a reference defining the worker reference following the discussion in #415

[mnapoli]

Thanks!

I wonder if this could work instead:

functions:
    foo:
        handler: worker.handler

constructs:
    emails:
        type: queue
        worker: foo

that would be simpler.

[jiw-mh]

Does Serverless support varied types?

[mnapoli]

This pattern is very common in serverless.yml (string or object value).

[jiw-mh]

I think I figured out how to specify the function and updated the PR to make worker optionally as a string

[mnapoli]

Can you document this new feature here: https://github.com/getlift/lift/blob/master/docs/queue.md#worker

Also I think it might be worth rebasing after we merge #416 so that we get a clear picture of the CI.

[jiw-mh]

@mnapoli I added some documentation and rebased the branch.

[jiw-mh]

@mnapoli is there something else I can do?