Update CHANELOG.md

Author: dapi

CHANGELOG.md

@@ -5,7 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [2.2.2] - 2019-08-22
+
+### Fixes
+
+* [#312] Lane metadata not being passed to CustomLaneHeader
 
 ## [2.2.1] - 2019-07-22