How should we handle linked tasks being cancelled?

[beerinho]

    await link(b).perform();
    await wait(1000);
    console.log(signal.aborted);
});

const b = task(async (_, { signal })=>{
    await wait(1000);
    console.log(signal.aborted);
});

a.perform();
b.cancelAll();

In this situation (provided b is cancelled after it starts and before it completes) a will remain in the isRunning state (but this might be removed by the recent updates to how state is derived) indefinitely and will also get no updates about what actually happened to its own task instance.

We need to think about the best path forward for this. Do we want to throw an error into a when b is cancelled so that the task at least has something to show

[nickschot]

Is this still a problem? Or did #98 fix it