Merge branch 'patch-1' into 'sprint'

Update CHANGELOG.md

See merge request open-platform/api!97

Author: Ruslan Molchanov

CHANGELOG.md

@@ -5,8 +5,6 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-### Added
-- Back-end: Tests to controllers
 
 ## [2.2.0] - 2018-06-22
 ### Added
@@ -18,6 +16,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - Transaction split: edit additional recipient's share
 - Transaction split: delete an additional recipient
 
+### Changed
+- Unit tests
+
 ## [2.1.0] - 2018-06-18
 ### Added
 - Public API Specification