ExtraDimensions not defined.

[fuchien]

React-native version 0.61.1
I am using the https://github.com/react-native-community/react-native-modal.

const deviceWidth = ExtraDimensions.get('window').width;
const deviceHeight =
     Platform.OS === 'ios'
         ? ExtraDimensions.get('window').height
         : ExtraDimensions.getRealWindowHeight();

[janczizikow]

I think this might be related to #56 and depreacted rnpm config.