WT1.1.11 Null-Safe migration

lib/bloc/session/session_bloc.dart

@@ -13,7 +13,7 @@ part 'session_state.dart';
 class SessionBloc extends Bloc<SessionEvent, SessionState> with Logging {
   final Session session;
 
-  SessionBloc({this.session}) : super(SessionInitial());
+  SessionBloc({required this.session}) : super(SessionInitial());
 
   @override
   Stream<SessionState> mapEventToState(

lib/bloc/session/session_event.dart

@@ -9,7 +9,7 @@ abstract class SessionEvent extends Equatable {
 
 class SessionStart extends SessionEvent {
   final SettingsBloc settingsBloc;
-  const SessionStart({this.settingsBloc});
+  const SessionStart({required this.settingsBloc});
 
   @override
   List<Object> get props => [settingsBloc];

lib/bloc/session/session_state.dart

@@ -21,7 +21,7 @@ class SessionReady extends SessionState {
 
 class SessionFailure extends SessionState {
   final String message;
-  const SessionFailure({this.message});
+  const SessionFailure({required this.message});
 
   @override
   List<Object> get props => [message];