Added react-dom as peer dependency
Added react-dom as peer dependency

Wasn't sure whether to but it does directly use ReactDOM to render now and it mirrors the react-native peer dependency in the NavigationReactNative package

grahammendick/navigation,grahammendick/navigation,grahammendick/navigation,grahammendick/navigation,grahammendick/navigation,grahammendick/navigation,grahammendick/navigation