fix lints

Author: hoc081098

example/lib/main.dart

@@ -6,9 +6,11 @@ import 'package:flutter_disposebag/flutter_disposebag.dart';
 import 'package:listenable_stream/listenable_stream.dart';
 import 'package:rxdart_ext/state_stream.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -26,27 +28,29 @@ class MyHomePage extends StatelessWidget {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text('listenable_stream example'),
+        title: const Text('listenable_stream example'),
       ),
       body: Center(
         child: ElevatedButton.icon(
-          label: Text('GO'),
+          label: const Text('GO'),
           onPressed: () {
             Navigator.push(
               context,
-              MaterialPageRoute(builder: (context) => MainPage()),
+              MaterialPageRoute(builder: (context) => const MainPage()),
             );
           },
-          icon: Icon(Icons.home),
+          icon: const Icon(Icons.home),
         ),
       ),
     );
   }
 }
 
 class MainPage extends StatefulWidget {
+  const MainPage({Key? key}) : super(key: key);
+
   @override
-  _MainPageState createState() => _MainPageState();
+  State<MainPage> createState() => _MainPageState();
 }
 
 class _MainPageState extends State<MainPage> with DisposeBagMixin {
@@ -79,7 +83,7 @@ class _MainPageState extends State<MainPage> with DisposeBagMixin {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text('Main'),
+        title: const Text('Main'),
       ),
       body: Padding(
         padding: const EdgeInsets.all(8.0),

example/test/widget_test.dart

@@ -13,7 +13,7 @@ import 'package:example/main.dart';
 void main() {
   testWidgets('Counter increments smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(MyApp());
+    await tester.pumpWidget(const MyApp());
 
     // Verify that our counter starts at 0.
     expect(find.text('0'), findsOneWidget);

pubspec.yaml

@@ -4,6 +4,8 @@ version: 1.1.0
 homepage: https://github.com/Flutter-Dart-Open-Source/listenable_stream.git
 repository: https://github.com/Flutter-Dart-Open-Source/listenable_stream.git
 issue_tracker: https://github.com/Flutter-Dart-Open-Source/listenable_stream/issues
+funding:
+  - https://www.buymeacoffee.com/hoc081098
 
 environment:
   sdk: '>=3.0.0 <4.0.0'
@@ -19,4 +21,9 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
 
-flutter:
+topics:
+  - rxdart
+  - hoc081098
+  - reactive-programming
+  - bloc
+  - state-management