message: fix(useUnmountedRef): compatibility to concurrent mode
diff: @@ -3,6 +3,8 @@ import { useRef, useEffect } from 'react';
  const useUnmountedRef = () => {
  const unmountedRef = useRef(false);
  useEffect(() => {
  + unmountedRef.current = false;
  +
  return () => {
  unmountedRef.current = true;
  };
  