Prepare polymer 0.12.2 release

pkg/polymer/CHANGELOG.md

Index: pkg/polymer/CHANGELOG.md
diff --git a/pkg/polymer/CHANGELOG.md b/pkg/polymer/CHANGELOG.md
index bc3d966c5919d47a206a5505d27bd9c1abb2f438..3879069ae62ab938a37ccf07e3051c63f77f2af8 100644
--- a/pkg/polymer/CHANGELOG.md
+++ b/pkg/polymer/CHANGELOG.md
@@ -4,7 +4,7 @@ This file contains highlights of what changes on each version of the polymer
 package. We will also note important changes to the polyfill packages (observe,
 web_components, and template_binding) if they impact polymer.
 
-#### Pub version 0.12.2-dev
+#### Pub version 0.12.2
   * Fix for [20539](http://dartbug.com/20539). Log widget will now html escape
     messages.
   * Fix for [20538](http://dartbug.com/20538). Log widget will now surface lint
@@ -15,6 +15,7 @@ web_components, and template_binding) if they impact polymer.
     **Note**: only native DOM types and custom elements written in Dart can be
     extended. Elements adapted from Javascript (like core- and paper- elements)
     cannot be extended.
+  * other bug fixes in `polymer:new_entry`.
 
 #### Pub version 0.12.1
   * **New**: When running in pub-serve, any warnings and errors detected by the