Update CHANGELOG.md

Author: shalvah

CHANGELOG.md

@@ -14,6 +14,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Removed
 c-generator/pull/575)
 
+## [3.16.3] - Thursday, 5 September 2019
+### Fixed
+- Removed references to removed helper functions in 6.0 (https://github.com/mpociot/laravel-apidoc-generator/pull/576)
+
 ## [3.16.2] - Wednesday, 4 September 2019
 ### Fixed
 - Support for Laravel 6 (https://github.com/mpociot/laravel-apidoc-generator/commit/f7dd8d19b75755763e8e20ab4025075eba5cd51a)