Set-output command is deprecated

[gesellix]

See https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

The action should use environment files.

[kolyshkin]

Should be fixed by #7

[kolyshkin]

@Tim-Zhang as per my previous comment, this can be closed. Yet we need a formal tagged release.

[Tim-Zhang]

released and close

[madelinevdp]

This is still an issue. @actions/core should be bumped to v1.10.0 or greater to remove the issue according to the documentation.

[kolyshkin]

Indeed it is :(

From https://github.com/opencontainers/runc/actions/runs/5159039670/jobs/9293449992:

Run tim-actions/get-pr-commits@v1.3.0
Warning: The `set-output` command is deprecated and will be disabled soon. Please upgrade to using Environment Files. For more information see: https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

@madelinevdp can you please open a PR, or an issue?

[kolyshkin]

Trying to fix this with #18