ember-cli-react/resolver not found

I follow the instructions in Readme, and overwrite my app/resolver.js to following:

```js
import Resolver from 'ember-cli-react/resolver';
export default Resolver;
```

But I receive an error, 'Could not find module `ember-cli-react/resolver` imported'

Checking the module `ember-cli-react`, I not found any resolver, directory, or .js file.

any help?