Adding support for macOS to GitHub Actions tests

[AdityyaX]

Increasing Access

Extending GitHub Action tests makes your project more reliable, compatible, and inviting to contributors and users. It ensures smoother functionality across different systems, fosters a welcoming community, and maintains high quality through continuous testing, ultimately increasing access to and adoption of your project.

Most appropriate sub-area of p5.js?

Other (specify if possible)

Feature request details

To extend the workflow to cover Windows as well

[AdityyaX]

@limzykenneth please assign this issue to me .
I would like to work on this issue

[limzykenneth]

There is not likely to be differences in terms of which OS the CI runs on as the runtime we rely on is Node.js and not the underlying OS. I don't think it is necessary to set it up to run on additional OSes for CI.