StreamClass.collect<S>(source: Source<S>): Task<Exclude<S, AnyFailure>[], Extract<S, AnyFailure>>
StreamClass#collect as a static: Stream.collect(source, …) is
Stream.from(source).collect(…).
await Stream.collect([1, 2]); // [1, 2]
Task<Exclude<S, AnyFailure>[], Extract<S, AnyFailure>>