useWatch支持dynamic path

[lilinhao1054]

为什么不支持watch动态的路径呢？事实上我传一个动态的namePath，它似乎也能正常工作，只是代码里写了让它warnning。但如果我传了一个动态的selector，它不起效，selector会保持不变，我想是否因为这里effect没有依赖dependencies（when type is func）。所以为什么不加上这个依赖呢？然后不用ref来接受namePath，将namePath也放入依赖中，似乎这样就支持动态路径，而不必报错了。

// in useWatch
  useEffect(
    () => {
      // Skip if not exist form instance
      if (!isValidForm) {
        return;
      }

      const { getFieldsValue, getInternalHooks } = formInstance;
      const { registerWatch } = getInternalHooks(HOOK_MARK);

      const getWatchValue = (values: any, allValues: any) => {
        const watchValue = options.preserve ? allValues : values;
        return typeof dependencies === 'function'
          ? dependencies(watchValue)
          : getValue(watchValue, namePathRef.current);
      };

      const cancelRegister = registerWatch((values, allValues) => {
        const newValue = getWatchValue(values, allValues);
        const nextValueStr = stringify(newValue);

        // Compare stringify in case it's nest object
        if (valueStrRef.current !== nextValueStr) {
          valueStrRef.current = nextValueStr;
          setValue(newValue);
        }
      });

      // TODO: We can improve this perf in future
      const initialValue = getWatchValue(getFieldsValue(), getFieldsValue(true));

      // React 18 has the bug that will queue update twice even the value is not changed
      // ref: https://github.com/facebook/react/issues/27213
      if (value !== initialValue) {
        setValue(initialValue);
      }

      return cancelRegister;
    },

    // We do not need re-register since namePath content is the same
    // eslint-disable-next-line react-hooks/exhaustive-deps
    [isValidForm],
  );