Fix GitHub Actions workflow

[rvalitov]

This PR fixes the tests workflow:

1. Issue with main.yml that uses ubuntu-latest and error:

No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.

The approach is the most simple: disable the feature of AppArmor to be able to run the tests.

2. Fixes the ava timeout message:

Timed out while running tests

3. Fixes the cookie tests because of incorrect PNG bits per pixel processing.
4. Adds Node.js v22 to the tests matrix.

[rvalitov]

Added timeout to ava otherwise there was a timeout error in the tests:

Timed out while running tests

[sindresorhus]

Thanks for working on this. Seems like tests are still failing.

[rvalitov]

Yes there's one more issue to fix. WIP

[rvalitov]

The problem is that now the PNG image is 24 bit. But the tests consider it to be 32 bit with alpha channel. I don't know if it was like that in the past or when this changed. The fix is easy. I will add a new commit today.

[rvalitov]

Now the PNG image is properly treated as 24 bit. And in tests I changed the black color to more complex to validate the numbers. Having all zeros for black looks too simple or a case when it's uninitialized.

[rvalitov]

@sindresorhus it's OK now and ready for review. If you merge this PR, then I would like to submit a new PR that updates the dependencies that are quite outdated.
Please let me know if there's any reason for not committing the package-lock.json file?

[sindresorhus]

Please let me know if there's any reason for not committing the package-lock.json file?

sindresorhus/ama#479 (comment)