Change: ViewStateBuilder error for default case.

Author: klisiewicz

lib/src/view/view_state_builder.dart

@@ -79,7 +79,7 @@ class ViewStateBuilder<T, C extends Cubit<ViewState>>
  } else if (state is Failure) {
  return onError?.call(context, state.error) ?? const SizedBox();
  } else {
- return const SizedBox();
+ throw ArgumentError.value(state, 'state');
  }
  },
  );