Fix use of deprecated commands
Fix use of deprecated commands

See https://github.blog/changelog/2020-10-01-github-actions-deprecating-set-env-and-add-path-commands/ and https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#environment-files.

stdlib-js/stdlib,stdlib-js/stdlib,stdlib-js/stdlib,stdlib-js/stdlib,stdlib-js/stdlib,stdlib-js/stdlib,stdlib-js/stdlib,stdlib-js/stdlib