Updating CHANGELOG.

Author: cyrilverloop

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](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+### Changed
+- sinon 19.0.2 => 20.0.0.
+
 ## [3.8.0] - 2025-02-28
 ### Changed
 - cyril-verloop/codingame-configuration 1.11.2 => 1.12.0.