Update CHANGELOG.md

Author: shalvah

CHANGELOG.md

@@ -13,6 +13,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+
+## [2.1.5] - 123h September, 2018
+### Fixed
+- Parse JSON responses from `@transformer` tag for DIngo router (https://github.com/mpociot/laravel-apidoc-generator/pull/323)
+
 ## [2.1.4] - 12th September, 2018
 ### Fixed
 - Parse JSON responses from  `@response` and `@transformer` tags correctly (https://github.com/mpociot/laravel-apidoc-generator/pull/321)