update CHANGELOG.md

Author: bingzhang

CHANGELOG.md

@@ -4,6 +4,9 @@ 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/).
 
+### Fixed
+- support uploading large file to dataset.
+
 ## 2.2.2 - 2019-09-27
 
 ### Changed