revert version change

pkgs/package_config/CHANGELOG.md

diff --git a/pkgs/package_config/CHANGELOG.md b/pkgs/package_config/CHANGELOG.md
index 4e095f2..9ecfe22 100644
--- a/pkgs/package_config/CHANGELOG.md
+++ b/pkgs/package_config/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 2.0.3
+## 2.0.3-dev
 
 - Improve file read performance; improve lookup performance.
 - Emit an error when a package is inside the package root of another package.

pkgs/package_config/pubspec.yaml

diff --git a/pkgs/package_config/pubspec.yaml b/pkgs/package_config/pubspec.yaml
index ea0f3b4..d4ed6b9 100644
--- a/pkgs/package_config/pubspec.yaml
+++ b/pkgs/package_config/pubspec.yaml
@@ -1,5 +1,5 @@
 name: package_config
-version: 2.0.3
+version: 2.0.3-dev
 description: Support for reading and writing Dart Package Configuration files.
 repository: https://github.com/dart-lang/package_config