Change the changelog

Author: pluma

CHANGELOG.md

@@ -7,11 +7,13 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
-### Added
+### Changed
 
-- Added type `DocumentSaveOptions` for `opts` in `DocumentCollection#save`
+- Added TypeScript validation for `opts` in `DocumentCollection#save`
+
+### Added
 
-- Added param `opts` of type `DocumentSaveOptions` in `EdgeCollection#save`
+- Added `opts` parameter to `EdgeCollection#save`
 
 ## [6.3.0] - 2018-06-20