CHANGELOG.md in sycamore-0.2.0 vs CHANGELOG.md in sycamore-0.2.1

@@ -2,22 +2,42 @@
 
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/) and
 [Keep a CHANGELOG](http://keepachangelog.com).
 
+
 ## [Unreleased]
 
+
+
+## [0.2.1] - 2016-04-07
+
+### Added
+
+- assigning `nil` via `Tree#[]=` removes a child tree, similar to the assignment
+  of `Sycamore::Nothing`
+
+### Fixed
+
+- #2: Rubinius support
+
+
+
 ## [0.2.0] - 2016-04-05
+
 ### Added
 
 - assigning `Sycamore::Nothing` via `Tree#[]=` removes a child tree
 - `Tree#search` for searching the tree for one or multiple nodes or a tree
 - `Tree#node!` as a more strict variant of `Tree#node`, which raises an error 
   when no node present
 
+
+
 ## 0.1.0 - 2016-03-28
 
 Initial release
 
 
-[Unreleased]: https://github.com/marcelotto/sycamore/compare/v0.2.0...HEAD
+[Unreleased]: https://github.com/marcelotto/sycamore/compare/v0.2.1...HEAD
+[0.2.1]: https://github.com/marcelotto/sycamore/compare/v0.2.0...v0.2.1
 [0.2.0]: https://github.com/marcelotto/sycamore/compare/v0.1.0...v0.2.0