Update changelog

CHANGELOG.md

@@ -6,9 +6,15 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
-  - Add 404 support
+Nothing yet.
 
-## [6.2.0] - 2019-02-12
+## [6.3.0] - 2019-03-30
+
+## Added
+
+  - You can now create custom error pages for 404 and 500 errors.
+
+## [6.2.0] - 2019-03-12
 
 ## Changed