test: Run full matrix even if a single job fails

[eps1lon]

What:

The validate pipeline previously immediately stopped once a single job failed. Now we complete every job even if another fails.

Why:

This made it impossible to know if an issue is invariant across the test matrix or tied to a specific value.

How:

Disable fail-fast

Checklist:

• [ ] Documentation added to the
  docs site
• [ ] Tests
• [ ] TypeScript definitions updated
• Ready to be merged
  

[codesandbox-ci]

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 791a32d:

Sandbox	Source
react-testing-library-examples	Configuration

[eps1lon]

Merging since the node 16 failure is due to nodejs/node#40030

[codecov]

Codecov Report

Merging #1027 (791a32d) into main (ba8dfb8) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main     #1027   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           25        25           
  Lines          916       916           
  Branches       286       286           
=========================================
  Hits           916       916           

Flag	Coverage Δ
node-12	100.00% <ø> (ø)
node-14	100.00% <ø> (ø)
node-16	?

Flags with carried forward coverage won't be shown. Click here to find out more.

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ba8dfb8...791a32d. Read the comment docs.

[github-actions]

🎉 This PR is included in version 8.4.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀