Fix example lints

@@ -12,7 +12,7 @@ Future<void> main() async {
 }
 
 class MyApp extends StatelessWidget {
-  const MyApp(this.title);
+  const MyApp(this.title, {Key? key}) : super(key: key);
 
   final String title;
 

@@ -19,7 +19,7 @@ dependency_overrides:
     path: ../
 
 dev_dependencies:
-  pedantic:
+  flutter_lints:
 
 flutter:
   uses-material-design: true