Add changes to changelog

Author: javierbrea

CHANGELOG.md

@@ -14,6 +14,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Changed
 - Project forked from xbyorange/mocks-server. Fixed license. Read NOTICE for further details
 
+### Fixed
+- Fix some minor Sonar bugs and code smells.
+
 ## [1.0.1] - 2019-06-04
 ### Fixed
 - Upgrade dependencies to fix potential security vulnerability