fix(runtime): 37 late fields with == null checks were wrongly migrated -> nullable. Fixes LateInitializationError crashes on page navigation (shop/checkout/comment/data pages)

lib/widgets/general/carousel.dart

@@ -30,7 +30,7 @@ class Carousel extends StatefulWidget {
 class CarouselState extends State<Carousel> {
   final _pageController = new PageController();
 
-  late Timer _timer;
+  Timer? _timer;
   int _currentPage = 0;
   bool reverse = false;
   GlobalKey<IndicatorState> _indicatorStateKey = new GlobalKey();
@@ -63,7 +63,7 @@ class CarouselState extends State<Carousel> {
   void dispose() {
     _pageController?.dispose();
     if (_timer != null) {
-      _timer.cancel();
+      _timer!.cancel();
     }
     super.dispose();
   }