`output.published` is a string, not boolean

[gsuess]

In the documentation and here it says that the output published is boolean type, whereas here it looks like that it is a string instead.

This can cause the a workflow with if condition to always fail:

  deploy-production:
    uses: ./.github/workflows/deploy.yml

    needs:
      - publish

    if: needs.publish.outputs.published

Given that its a string, the last line should be be:

    if: needs.publish.outputs.published == 'true'

[StyleShit]

I'm assuming it's due to the @actions/core API:

https://github.com/actions/toolkit/blob/8d8a914a9450f1dfee18f4c547686d63303ddd0f/packages/core/src/core.ts#L210-L225

[bluwy]

I believe it's not possible to set a boolean through github output. We should update the docs.

[bluwy]

Fixed in #703