message: Prepare 2.3.3 release.
diff: @@ -5,10 +5,12 @@ 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
  -* Don't run Babel at all if there are no meaningful changes to make.
  +<!-- ## Unreleased -->
  <!-- Add new, unreleased changes here. -->
  +## [2.3.3] - 2018-03-14
  +* Don't run Babel at all if there are no meaningful changes to make.
  +
  ## [2.3.2] - 2018-03-13
  * Fix bug where JS compilation/minification would ignore the "excludes" field.
  