Fix analysis errors

Author: renefloor

flutter_cache_manager/example/lib/generated_plugin_registrant.dart

@@ -2,6 +2,7 @@
 // Generated file. Do not edit.
 //
 
+// ignore_for_file: directives_ordering
 // ignore_for_file: lines_longer_than_80_chars
 
 import 'package:url_launcher_web/url_launcher_web.dart';

flutter_cache_manager/lib/src/web/web_helper.dart

@@ -6,11 +6,11 @@ import 'package:clock/clock.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
+import 'package:flutter_cache_manager/src/cache_store.dart';
+import 'package:flutter_cache_manager/src/result/file_info.dart';
 import 'package:flutter_cache_manager/src/result/file_response.dart';
 import 'package:flutter_cache_manager/src/storage/cache_object.dart';
-import 'package:flutter_cache_manager/src/cache_store.dart';
 import 'package:flutter_cache_manager/src/web/file_service.dart';
-import 'package:flutter_cache_manager/src/result/file_info.dart';
 import 'package:flutter_cache_manager/src/web/queue_item.dart';
 import 'package:pedantic/pedantic.dart';
 import 'package:rxdart/rxdart.dart';

flutter_cache_manager/test/image_cache_manager_test.dart

@@ -14,9 +14,7 @@ const fileName = 'test.jpg';
 const fileUrl = 'baseflow.com/test';
 final validTill = DateTime.now().add(const Duration(days: 1));
 void main() {
-  setUp(() {
-    WidgetsFlutterBinding.ensureInitialized();
-  });
+  setUp(WidgetsFlutterBinding.ensureInitialized);
 
   tearDown(() {
     PaintingBinding.instance?.imageCache?.clear();

flutter_cache_manager/test/mock.dart

@@ -9,4 +9,5 @@ import 'package:mockito/annotations.dart';
   MockSpec<FileService>(as: #MockFileServiceBase),
   MockSpec<WebHelper>(),
 ])
+// ignore: unused_element
 void _f() {}

flutter_cache_manager/test/mock.mocks.dart

@@ -244,6 +244,6 @@ class MockWebHelper extends _i1.Mock implements _i9.WebHelper {
                 #authHeaders: authHeaders,
                 #ignoreMemCache: ignoreMemCache
               }),
-              returnValue: Stream<_i10.FileResponse>.empty())
+              returnValue: const Stream<_i10.FileResponse>.empty())
           as _i7.Stream<_i10.FileResponse>);
 }