Make version number ready for release.

pkgs/package_config/pubspec.yaml

diff --git a/pkgs/package_config/pubspec.yaml b/pkgs/package_config/pubspec.yaml
index a69096d..b51932e 100644
--- a/pkgs/package_config/pubspec.yaml
+++ b/pkgs/package_config/pubspec.yaml
@@ -1,5 +1,5 @@
 name: package_config
-version: 1.1.0-pre
+version: 1.1.0
 description: Support for working with Package Resolution config files.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/package_config