0.5.0 changelog

Author: benjeffery

CHANGELOG.md

@@ -1,9 +1,13 @@
 # Changelog
 
-## [0.4.2] - 2025-10-16
+## [0.5.0] - 2025-11-09
 
 ** Changes **
 
+- Internal changes to ancestor generation to improve performace. These change the inferred ancestors
+  and therefore the inferred tree sequence. For details see this [blog post](https://tskit.dev/news/20251109-tsinfer-0.5.0.html).
+  ({pr}`1012`, {user}`duncanMR`)
+
 - Drop Python 3.9 support, require Python >= 3.10 ({pr}`1044`, {user}`benjeffery`)
 
 - Remove overzealous derived state validation in C API. ({pr}`1059`, {user}`benjeffery`)