Pull in test_reflective_loader 0.0.4 and switch analyzer to it.

pkg/analyzer/test/src/task/html_work_manager_test.dart

Index: pkg/analyzer/test/src/task/html_work_manager_test.dart
diff --git a/pkg/analyzer/test/src/task/html_work_manager_test.dart b/pkg/analyzer/test/src/task/html_work_manager_test.dart
index 8d1d168b7d43f874a4158cdd27e92f4717d6f1d3..5f99c4434ba42777e09d5448e708ddcc357fb501 100644
--- a/pkg/analyzer/test/src/task/html_work_manager_test.dart
+++ b/pkg/analyzer/test/src/task/html_work_manager_test.dart
@@ -23,16 +23,16 @@ import 'package:analyzer/task/dart.dart';
 import 'package:analyzer/task/general.dart';
 import 'package:analyzer/task/html.dart';
 import 'package:analyzer/task/model.dart';
+import 'package:test_reflective_loader/test_reflective_loader.dart';
 import 'package:typed_mock/typed_mock.dart';
 import 'package:unittest/unittest.dart';
 
 import '../../generated/test_support.dart';
-import '../../reflective_tests.dart';
 import '../../utils.dart';
 
 main() {
   initializeTestEnvironment();
-  runReflectiveTests(HtmlWorkManagerTest);
+  defineReflectiveTests(HtmlWorkManagerTest);
 }
 
 @reflectiveTest