bumped release to 0.2.1

Author: orbeckst

CHANGELOG.md

@@ -4,9 +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).
 
-## [Unreleased]
-### Changed
-
+## [0.2.1] - 2018-10-05
 ### Added
 - documentation (#4)
 - automatic deployment of docs to