Update CHANGELOG.md

Author: geaz

CHANGELOG.md

@@ -5,10 +5,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+
+## [0.5.4] - 2020-04-29
 ### Add
 - Intercept clicks to external links and open them in the system browser
 - Patch for webview to open the webview on 'Run' instead of initialization (Windows)
 
+### Fixed
+- GC no longer disposes the callback functions of the webview binds
+
 ## [0.5.3] - 2020-04-27
 ### Changed
 - Renamed *wwwroot* to *app* - HostedContent