Changelog: Update 0.5 release date

Author: andreaskurth

CHANGELOG.md

@@ -4,7 +4,7 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## 0.5.0 - 2018-11-29
+## 0.5.0 - 2018-12-18
 - Add axi channel delayer
 
 ### Changed