Update CHANGELOG.

Author: mekras

Diff for: CHANGELOG.md

@@ -1,4 +1,38 @@
 # Change Log
 
+## [Unreleased]
 
-## Unreleased
+
+## 0.4.0 - 2015-12-16
+
+### Changed
+
+- Switch to php-http/message-factory 1.0
+
+
+## 0.3.1 - 2015-12-14
+
+### Changed
+
+- Requirements fixed.
+
+
+## 0.3.0 - 2015-11-24
+
+### Changed
+
+- Use cURL constants as options keys.
+
+
+## 0.2.0 - 2015-11-17
+
+### Added
+
+- HttpAsyncClient support.
+
+
+## 0.1.0 - 2015-11-11
+
+### Added
+
+- Initial release