Updated changelog

Author: dvanscott

CHANGELOG.md

@@ -5,6 +5,8 @@ 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).
 
-## [1.0.0] - 2019-07-01
+## [Unreleased]
 
-Initial release
+## [1.0.0] - 2019-08-01
+
+- Initial release