updated changelog

Author: dantleech

CHANGELOG.md

@@ -1,9 +1,15 @@
-Changelog
-=========
+# Changelog
 
-master
-------
+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).
+
+## [0.2.0] - 2018-12-15
 
 - Removed archive functionality, now uses a single lock file.
 - Improved report to show author, hash and added option to show the full
   commit message.
+- Handle runtime errors that may happen during composer update (e.g. exceeding
+  API limit).
+- Various refactoring.