Editorial: update WPT

[MattiasBuelens]

It looks like it's been a while since we synced the reference implementation with the latest WPT. This aims to fix that.

The following errors came up:

• Error: Unexpected URL: /common/gc.js: I opened Update WPT domenic/wpt-runner#27 to include this file.
• structuredClone is not defined: I expose this function in the test runner, and bumped the CI to Node 18.
• enqueue() must not synchronously call write algorithm: This test was added in [Gecko Bug 1822675] Part 1: Call write asynchronously from PipeToPump web-platform-tests/wpt#39103, but was not tested against the reference implementation. I'm not entirely sure what the intention was here: does the spec need to be updated for this? 😕

[ricea]

I'm not entirely sure what the intention was here: does the spec need to be updated for this? confused

Yes. This is #1243. We plan to update the spec to require a microtask between enqueue() and write(), but we haven't done it yet.

[youennf]

Yes. This is #1243. We plan to update the spec to require a microtask between enqueue() and write(), but we haven't done it yet.

Is #1243 easily resolvable?
Another approach would be to move this specific test in a separate file and disable it in this repo until #1243 can be resolved.

[youennf]

#1282 is a new attempt at fixing the same issue.
It basically takes this PR and add a few additional changes. PR CI is green.

[youennf]

Shall we close this one?

[MattiasBuelens]

Closing, because superseded by #1282.