prep for release (#879)

diff --git a/lib/src/util/dart.dart b/lib/src/util/dart.dart
index da514e1..7ff444a 100644
--- a/lib/src/util/dart.dart
+++ b/lib/src/util/dart.dart
@@ -29,7 +29,6 @@
           mimeType: 'application/dart', encoding: utf8),
       [],
       message,
-      packageRoot: await resolver.packageRoot,
       packageConfig: await resolver.packageConfigUri,
       checked: checked,
       onExit: onExit);
diff --git a/pubspec.yaml b/pubspec.yaml
index 1404505..61ff589 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: test
-version: 0.12.41-dev
+version: 0.12.41
 author: Dart Team <misc@dartlang.org>
 description: A library for writing dart unit tests.
 homepage: https://github.com/dart-lang/test