Update CHANGELOG.md

Author: stipsan

CHANGELOG.md

@@ -5,6 +5,10 @@ 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]
+### Changed
+* Updated typescript definition making options optional (#75 @pelotom)
+
 ## [1.0.5] - 2016-11-12
 ### Fixed
 * Fix TypeScript definition file issues (#74 @forabi)
@@ -36,5 +40,6 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 * Initial release.
 
+[Unreleased]: https://github.com/stipsan/scroll-into-view-if-needed/compare/v1.0.5...HEAD
 [1.0.5]: https://github.com/stipsan/scroll-into-view-if-needed/compare/v1.0.4...v1.0.5
 [1.0.4]: https://github.com/stipsan/scroll-into-view-if-needed/compare/v1.0.3...v1.0.4