Update changelog

Author: wadetandy

CHANGELOG.md

@@ -6,6 +6,9 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+## 1.3.0 [2018-05-01]
+### Added
+- Now compatible with typescript up to version 2.8.3. Previously only tested with <= 2.6.2
 
 ## 1.1.0 [2018-03-28]
 ### Changed