Async 'race' and 'all' cancellation after first rejection

Running the following script in deno exits the job after 5 seconds, suggesting the first Async (the one resolving in 'OK') keeps running even after the second Async has been rejected:

```
import crocks from 'https://cdn.skypack.dev/crocks'
const {Async} = crocks

const test = Async.resolveAfter(5000, 'OK').race(Async.rejectAfter(1000, 'TIMEOUT'))

test.fork(console.log, console.log)
```
A similar behavior happens with `Async.all`: when a computation is rejected, all the remaining keep going.
Is this the intended behavior? I expect all the remaining computations to be cancelled and the cleanup functions to be executed after a single Aync has been rejected.