CHANGELOG update

Author: Arvtesh

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/); this project adheres to [Semantic Versioning](http://semver.org/).
 
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-## [0.9.7] - unreleased
+## [0.9.7] - 2018.09.27
 
 ### Added
 - Added convenience overloads for `SetException`-like methods accepting as error message string.