add v0.2.0 to changelog

Author: Gummibeer

docs/changelog.md

@@ -4,6 +4,8 @@ All notable changes to this package will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/).
 
 ## [Unreleased]
+
+## [v0.2.0] - 2019-10-11
 ### Added
 - `\Astrotomic\Stancy\Factories\SitemapFactory::makeFromSheetList()` which allows to load multiple collections and/or single sheets
 
@@ -16,5 +18,6 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/).
 ### Added
 - First release - until [v1.0.0] kind of proof of concept
 
-[Unreleased]: https://github.com/Astrotomic/stancy/commits/master
+[Unreleased]: https://github.com/Astrotomic/stancy/compare/0.2.0...master
+[v0.2.0]: https://github.com/Astrotomic/stancy/releases/tag/0.2.0
 [v0.1.0]: https://github.com/Astrotomic/stancy/releases/tag/0.1.0