fix lints

packages/flutter_mozilla_components/example/pubspec.yaml

@@ -16,10 +16,10 @@ dependencies:
     path: ../
 
 dev_dependencies:
-  integration_test:
-    sdk: flutter
   flutter_test:
     sdk: flutter
+  integration_test:
+    sdk: flutter
   lint: ^2.8.0
 
 flutter:

packages/flutter_mozilla_components/example/test/widget_test.dart

@@ -6,9 +6,8 @@
 // tree, read text, and verify that the values of widget properties are correct.
 
 import 'package:flutter/material.dart';
-import 'package:flutter_test/flutter_test.dart';
-
 import 'package:flutter_mozilla_components_example/main.dart';
+import 'package:flutter_test/flutter_test.dart';
 
 void main() {
   testWidgets('Verify Platform version', (WidgetTester tester) async {