Bump version to 0.0.2+4
diff --git a/pubspec.yaml b/pubspec.yaml
index 2a84d20..aca9c83 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: package_config
-version: 0.0.2+3
+version: 0.0.2+4
 description: Support for working with Package Resolution config files.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/package_config