refactor: switch from process.nextTick() to queueMicrotask()

[SukkaW]

The PR closes #934.

The PR does the following things:

• Add queueMicrotask ponyfill
  • The ponyfill will prefer native queueMicrotask when available, and will fallback to Promise.resolve().then otherwise.
  • The unit test cases for the ponyfill have also been added
• Replace all process.nextTick with queueMicrotask
  • Note that process.nextTick has a function signature of process.nextTick(fn, ...fnArgs) (passing arguments as rest parameters), while queueMicrotask does not have ...fnArgs.
• Remove the nextTick implementation and test cases
  • The PR also removes the nextTick from the process ponyfill and its type definition

Also a question: should we also replace setImmediate with queueMicrotask? Both of them will flush the callback after microtask queue has emptied.

[SukkaW]

@streamich @G-Rath Kindly request your attention with a friendly ping. It has been more than a month since I opened this PR. During this time, I've rebased my PR on top of your pushes many times.

I would greatly appreciate it if you could spare some time to review it, at your convenience, and provide your valuable feedback.

I know it would be annoying for you to receive a "ping" like this. However, considering that almost every memfs issue is enforcing the "PR is welcome" policy, ignoring my "All checks have passed" PR doesn't look right.

[G-Rath]

@SukkaW you've rebased this 2-3 times at most - I do my best to keep on top of the open source repositories I help maintain but my time is finite.

This pull request is not one I'd consider critical which is why I have not jumped on it (as it will probably be landed as a refactor it's not even going to be released by itself); your weekly spamming of me as well as sass in your latest commit did not help make me enthusiastic about your work here.

As it happens I will have time tomorrow I can spend landing this but do not take that as a promise since my personal life takes priority.

Also please don't take this as a request not to continue contributing - I appreciate the support, so long as you understand the priorities; likewise feel free to mention if a particular PR would resolve a particular issue you're having, to get that prioritized.

[streamich]

Thank you!

[streamich]

🎉 This PR is included in version 4.6.0 🎉

The release is available on:

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

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