Update CHANGELOG.md

Author: morgante

CHANGELOG.md

@@ -5,7 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this
 project adheres to [Semantic Versioning](http://semver.org/).
 
-## [Unreleased]
+## [Unreleased] - major
+
+### Changed
+
+- Support aggregated log exports by integrating log-export module. [#18]
 
 ## [0.1.0] - 2019-04-03
 
@@ -15,3 +19,5 @@ project adheres to [Semantic Versioning](http://semver.org/).
 
 [Unreleased]: https://github.com/terraform-google-modules/terraform-google-event-function/compare/v0.1.0...HEAD
 [0.1.0]: https://github.com/terraform-google-modules/terraform-google-event-function/releases/tag/v0.1.0
+
+[#18]: https://github.com/terraform-google-modules/terraform-google-event-function/pull/18