message: Prepare to release v2.2.1
diff: @@ -5,7 +5,9 @@ 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
  +<!-- ## Unreleased -->
  +
  +## [2.2.1] - 2017-11-16
  - The array of warnings returned by `Linter#lint()` and `Linter#lintPackage()` now also has a non-enumerable `analysis` property, which refers to the immutable `Analysis` used to generate the lint results.
  - Fixed `iron-flex-layout-classes` to handle `class$` attribute.
  