prepare release

Author: dbu

CHANGELOG.md

@@ -6,7 +6,7 @@ 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).
 
-## [1.12.0] - ?
+## [1.12.0] - 2021-08-29
 
 - Added support for adjusting binary detection regex in FullHttpMessageFormatter