message: chore: optimize useClockAway demo
diff: import React, { useState, useRef } from 'react';
  import { Button } from 'antd';
  -// import { useClickAway } from 'ahooks';
  import { useClickAway } from 'ahooks';
  export default () => {
  const [counter, setCounter] = useState(0);
  - const ref = useRef();
  + const ref = useRef<HTMLSpanElement>();
  useClickAway(() => {
  setCounter(s => s + 1);
  }, ref);
  