[React Intl] Could not find required `intl` object. <IntlProvider> needs to exist in the component ancestry.

当使用umi max的国际化时，如果用KeepAlive标签包裹会报错：
```
export default () => (
  <KeepAlive saveScrollPosition="screen" name="/file-manage:谛听">
    <Page />
  </KeepAlive>
);
```
如果不用KeepAlive，正常显示：
```
export default () => (
    <Page />
);
```

此外，使用KeepAlive后，`useModel('@@initialState');`也使用不了