message: fix(@vant/use): reset method param should be optional
diff: @@ -121,7 +121,7 @@ export function useCountDown(options: UseCountDownOptions) {
  }
  };
  - const reset = (totalTime: number) => {
  + const reset = (totalTime: number = options.time) => {
  pause();
  remain.value = totalTime;
  };
  