Updated changelog

Author: mikebronner

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 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).
 
+## [0.5.3] - 21 May 2019
+### Fixed
+- calling `flushCache()` on non-cachable related models.
+
 ## [0.5.2] - 21 May 2019
 Pushed changes intended for 0.5.1. Forgot to push changes to repo. 👀