Support custom Pull Request number

[jhen0409]

In our case, we have to handle every push on the PR instead of pull_request.

This PR adds pr-number, so we can do like the following workflow:

name: CI
on: [push]
jobs:
  test:
    runs-on: ubuntu-18.04
    steps:
      - ......

      - uses: jwalton/gh-find-current-pr@v1
        id: findPR
        with:
          state: open

      - uses: kanga333/comment-hider@v0.3.0
        name: Hide outdated bot comments
        if: success() && steps.findPR.outputs.number
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          issue_number: ${{ steps.findPR.outputs.number }}

      - name: Report code coverage
        uses: jhen0409/github-actions-report-lcov@main
        if: success() && steps.findPr.outputs.number
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          coverage-files: ./coverage/lcov.info
          artifact-name: coverage-root
          pr-number: ${{ steps.findPR.outputs.number }}

Or we might be able to use it with workflow_dispatch.

[zgosalvez]

Thanks for this! Please update the readme further. "Number of the Pull Request. Optional." is vague and doesn't explain why someone would want to set this input.

[zgosalvez]

Thanks for the update. I'll keep this open since, upon review, it is closely related to #22 and #25

[zgosalvez]

Hi @jhen0409! Thank you again for this. I've made some modifications that I'd like you to test before we merge to main.