ci: add macos to pipeline

[dnalborczyk]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

ref: #4300

[codecov]

Codecov Report

Merging #4307 (4298516) into master (48f0e31) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4307   +/-   ##
=======================================
  Coverage   98.44%   98.44%           
=======================================
  Files         205      205           
  Lines        7316     7316           
  Branches     2084     2084           
=======================================
  Hits         7202     7202           
  Misses         55       55           
  Partials       59       59           

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[kzc]

Thanks.

Note to @lukastaegert: PR #4308 should be merged before PR #4307.

[lukastaegert]

Are you really sure we need all those versions? Not sure in how far this uses up contingents we get from Github, but also, what bugs do you expect to find here except make CI runs potentially slower? IMO it should be enough to do all relevant versions for the fastest OS (which is Linux on CI), which should handle the subtle version differences, and only do the oldest supported and latest supported for MacOS and Windows.

[dnalborczyk]

not sure what the GH actions usage limit for OSS is actually. but as far as I know, modules are usually tested against the latest LTS versions on multiple operating systems. but it's all up to the developer to decide.

testing the earliest supported LTS and the latest supported LTS plus latest version is probably fine tho.
since it's free, and just some settings, I'd personally go for all. it might not apply to rollup (or it might), but there are sometimes some small intricacies between node versions.

[kzc]

When testing against 48f0e31, node v10.x does not run npm test reliably on my Mac. Node v12, v14 and v16 do run successfully. I think running rollup tests against node v10 is a lost cause on Mac.

My personal preference would be to run the latest stable node v16 on Mac rather than the unstable node v17, as more users use the former.