message: refactor(forkJoin): improve type safety of resultSelector call
diff: @@ -204,14 +204,14 @@ class ForkJoinSubscriber<T, R> extends OuterSubscriber<T, T> {
  }
  if (haveValues === len) {
  - let value: any;
  + let result: R | T[];
  try {
  - value = resultSelector ? resultSelector.apply(this, values) : values;
  + result = resultSelector ? resultSelector(...values) : values;
  } catch (err) {
  destination.error(err);
  return;
  }
  - destination.next(value);
  + destination.next(result);
  }
  destination.complete();
  