fixed date in change log

Author: catmando

change-log.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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## 1.0alpha1.5 - 2019-02-15
+## 1.0alpha1.5 - 2019-06-19
 ### Security
 + [#165](https://github.com/hyperstack-org/hyperstack/issues/165) Secure access to `composed_of` relationships.