fix dart analyze issue

Author: ahmedAlaaInstabug

analysis_options.yaml

@@ -28,10 +28,6 @@ analyzer:
     missing_return: warning
     # allow having TODOs in the code
     todo: ignore
-    # Ignore analyzer hints for updating pubspecs when using Future or
-    # Stream and not importing dart:async
-    # Please see https://github.com/flutter/flutter/pull/24528 for details.
-    sdk_version_async_exported_from_core: ignore
   exclude:
     - 'bin/cache/**'
     # the following two are relative to the stocks example and the flutter package respectively

example/lib/main.dart

@@ -4,11 +4,10 @@ import 'package:instabug_flutter/instabug_flutter.dart';
 
 Future<void> main() async {
   runApp(const MyApp());
-  Instabug.start(
-      'ed6f659591566da19b67857e1b9d40ab', [InvocationEvent.floatingButton]);
+  Instabug.init(
+     token:  'ed6f659591566da19b67857e1b9d40ab', invocationEvents: [InvocationEvent.floatingButton]);
   final client = InstabugHttpClient();
-  final response = await client.get(Uri.parse('https://google.com'));
-  print(response.body);
+  await client.get(Uri.parse('https://google.com'));
 }
 
 class MyApp extends StatelessWidget {
@@ -58,7 +57,7 @@ class _MyHomePageState extends State<MyHomePage> {
             ),
             Text(
               '$_counter',
-              style: Theme.of(context).textTheme.headline4,
+              style: Theme.of(context).textTheme.headlineMedium,
             ),
           ],
         ),

test/instabug_http_client_test.dart

@@ -14,7 +14,7 @@ import 'package:mockito/mockito.dart';
 
 import 'instabug_http_client_test.mocks.dart';
 
-@GenerateMocks([
+@GenerateMocks(<Type>[
   InstabugHttpLogger,
   InstabugHttpClient,
 ])