message: refactor(timeout): remove unnecessary falsy check
diff: @@ -372,7 +372,8 @@ export function timeout<T, R, M>(config: number | Date | TimeoutConfig<T, R, M>,
  seen++;
  // Emit
  subscriber.next((lastValue = value));
  - each && each > 0 && startTimer(each);
  + // null | undefined are both < 0. Thanks, JavaScript.
  + each! > 0 && startTimer(each!);
  },
  undefined,
  undefined,
  