Update CHANGELOG.md in preparation for 0.59.0 release

ponylang-main · ponylang-main · commit c4886a7d528b · 2025-04-26T15:25:52.000Z
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 All notable changes to the Pony compiler and standard library will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org/) and [Keep a CHANGELOG](http://keepachangelog.com/).
 
-## [unreleased] - unreleased
+## [0.59.0] - 2025-04-26
 
 ### Fixed
 
