Updated Changelog (#3)

* updated Changelog

Author: pwnyprod

CHANGELOG.md

@@ -4,13 +4,16 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Unreleased
 
+## [2.2.3]
 ### Added
+
 * WIP: add bank transfer payment method
 * make tests more verbose
 
-### Fixed 
-* refund request can not be generated
+### Fixed
 
+* changed guzzle/httpguzzle version for compatibility with PayPal
+* refund request can not be generated
 
 ## [2.2.2]
 ### Fixed