Hi I'm getting the following with RNN, when running `react-native run-android`:

`MainApplication.java:22: error: MainApplication is not abstract and does not override abstract method createAdditionalReactPackages() in NavigationApplication
public class MainApplication extends NavigationApplication{
^
MainApplication.java:31: error: method does not override or implement a method from a supertype
@Override
^`

My MainApplication.java (snippet): <https://pastebin.com/8eFNguPn>

I'm using 
react-native-cli: 2.0.1
react-native: 0.51.0