Update SDK constraint to be 2.0.0 dev friendly.
diff --git a/pkgs/package_config/pubspec.yaml b/pkgs/package_config/pubspec.yaml
index eaef83e..a629eaf 100644
--- a/pkgs/package_config/pubspec.yaml
+++ b/pkgs/package_config/pubspec.yaml
@@ -1,15 +1,15 @@
 name: package_config
-version: 1.0.1
+version: 1.0.2
 description: Support for working with Package Resolution config files.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/package_config
 
 environment:
-  sdk: '>=1.11.0-dev.0.0 <2.0.0'
+  sdk: '>=1.11.0 <2.0.0-dev.infinity'
 
 dependencies:
   charcode: ^1.1.0
   path: ^1.0.0
 
 dev_dependencies:
-  test: '>=0.12.0 <0.13.0'
+  test: ^0.12.0