Action to determine if a tag exists.

To check if a tag named example exists in your current repository:

- uses: action-pack/tag-exists@v1
  id: check
  with: 
    tag: 'example'

- run: echo ${{ steps.check.outputs.exists }}

Required - The tag to search for.

Optional - External repository name inowner/repo format.

A string value of 'true' or 'false'