transitionConfig removed from createStackNavigator error

### Version
Tell us which versions you are using:

- react-native-router-flux v4.3.0
- react v16.13.1
- react-native v0.6.4

### Expected behavior

Before I was able to handle navigation animations with transitionConfig prop

### Actual behavior

Now I can't control them

Any Ideas on how I can for example remove all navigation animations? Especially on android

@aksonov Any solutions?