Support absolute path in `files` setting

I would like to collect test results somewhere in /tmp (so that I don’t modify the checked out source tree that is the current working directory). Unfortunately, this fails with the following error:

Traceback (most recent call last):
  File "/action/publish_unit_test_results.py", line 202, in <module>
    main(settings)
  File "/action/publish_unit_test_results.py", line 52, in main
    files = [str(file) for file in pathlib.Path().glob(settings.files_glob)]
  File "/action/publish_unit_test_results.py", line 52, in <listcomp>
    files = [str(file) for file in pathlib.Path().glob(settings.files_glob)]
  File "/usr/local/lib/python3.6/pathlib.py", line 1098, in glob
    raise NotImplementedError("Non-relative patterns are unsupported")
NotImplementedError: Non-relative patterns are unsupported

Here is my configuration:

      - name: Publish Unit Test Results
        uses: EnricoMi/publish-unit-test-result-action@v1.12
        # run even if tests failed
        if: always()
        with:
          files: /tmp/test-reports/**/*.xml

[EnricoMi]

Sorry, I had to revert that feature as it introduced some regression: #124

[EnricoMi]

I think the issue is that uses: EnricoMi/publish-unit-test-result-action@v1 runs the action in a docker container which mounts the current working directory but nothing beyond.

The following should work:

      - name: Move artifacts from /tmp into CWD
        run: mv -v /tmp/e2e-artifacts ./

      - name: Publish Unit Test Results
        uses: EnricoMi/publish-unit-test-result-action@v1
        if: always()
        with:
          files: |
             ./e2e-artifacts/results.xml