Use the new test runner.

test/test_all.dart

Index: test/test_all.dart
diff --git a/test/test_all.dart b/test/test_all.dart
deleted file mode 100644
index 533dde82e843134cc41e800bb6812f9e00c4f533..0000000000000000000000000000000000000000
--- a/test/test_all.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library pub_semver.test.test_all;
-
-import 'package:unittest/unittest.dart';
-
-import 'version_constraint_test.dart' as version_constraint_test;
-import 'version_range_test.dart' as version_range_test;
-import 'version_test.dart' as version_test;
-
-main() {
-  group('Version', version_test.main);
-  group('VersionConstraint', version_constraint_test.main);
-  group('VersionRange', version_range_test.main);
-}