fix lints

packages/speech_to_text_dialog/example/lib/main.dart

@@ -1,6 +1,6 @@
-import 'package:flutter/material.dart';
 import 'dart:async';
 
+import 'package:flutter/material.dart';
 import 'package:speech_to_text_dialog/speech_to_text_dialog.dart';
 
 void main() {
@@ -50,7 +50,7 @@ class _MyAppState extends State<MyApp> {
 
   @override
   void dispose() {
-    _textSubscription?.cancel();
+    unawaited(_textSubscription?.cancel());
     _speechToTextDialog.dispose();
     super.dispose();
   }

packages/speech_to_text_dialog/example/pubspec.yaml

@@ -26,15 +26,11 @@ dependencies:
     # the parent directory to use the current plugin's version.
     path: ../
 
-  # The following adds the Cupertino Icons font to your application.
-  # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.8
-
 dev_dependencies:
-  integration_test:
-    sdk: flutter
   flutter_test:
     sdk: flutter
+  integration_test:
+    sdk: flutter
 
   # The "flutter_lints" package below contains a set of recommended lints to
   # encourage good coding practices. The lint set provided by the package is

packages/speech_to_text_dialog/lib/speech_to_text_dialog.dart

@@ -20,7 +20,7 @@
 
 import 'dart:async';
 import 'package:flutter/services.dart' show BinaryMessenger;
-import 'src/pigeons/speech_to_text.g.dart';
+import 'package:speech_to_text_dialog/src/pigeons/speech_to_text.g.dart';
 
 /// Speech recognition dialog using Android's RecognizerIntent.
 ///
@@ -82,7 +82,7 @@ class SpeechToTextDialog implements SpeechToTextEvents {
   ///   print('Speech recognition not available');
   /// }
   /// ```
-  Future<bool> showDialog({String? locale}) async {
+  Future<bool> showDialog({String? locale}) {
     return _api.showDialog(locale: locale);
   }
 
@@ -101,7 +101,7 @@ class SpeechToTextDialog implements SpeechToTextEvents {
     if (!_disposed) {
       _disposed = true;
       SpeechToTextEvents.setUp(null, binaryMessenger: _binaryMessenger);
-      _textStreamController.close();
+      unawaited(_textStreamController.close());
     }
   }
 }