Added next version placeholder to changelog

Author: XedinUnknown

CHANGELOG.md

@@ -4,6 +4,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [[*next-version*]] - YYYY-MM-DD
+
 ## [0.1] - 2019-11-05
 Stable release