message: Updated CHANGELOG for 1.2.1 release.
diff: @@ -5,7 +5,7 @@ All notable changes to this project will be documented in this file.
  The format is based on [Keep a Changelog](http://keepachangelog.com/)
  and this project adheres to [Semantic Versioning](http://semver.org/).
  -## Unreleased
  +## [1.2.1] - 2017-05-03
  * Dependency updates. Upgraded to new `polymer-bundler`. Most important update is a fix to bug whereby `lazy-import` links were being moved out of their `<dom-module>` containers.
  