Windows assets are not applied

I've added `react-native-router-flux` into my project and `react-native-experimental-navigation` has been added as a dependency too. Although the Windows assets were committed already(https://github.com/aksonov/react-native-experimental-navigation/commit/c862d77557c28e0530bcd5cd6f95c75ff1e957bf), I'm not seeing those in `node_modules/react-native-experimental-navigation/assets`

```
$ npm i
MY_PRJ
`-- react-native-router-flux@3.37.0
`-- react-native-experimental-navigation@0.26.10
```

There are only iOS and Android assets.
```
$ ls
'back@1.5x.android.png' 'back@1x.ios.png' 'back@3x.android.png' 'back@4x.ios.png'
'back@1.5x.ios.png' 'back@2x.android.png' 'back@3x.ios.png'
'back@1x.android.png' 'back@2x.ios.png' 'back@4x.android.png'
```

Can anyone confirm this?