Updating CHANGELOG for 3.0.0.

Author: cyrilverloop

CHANGELOG.md

@@ -4,12 +4,13 @@ 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]
+## [3.0.0] - 2024-05-24
 ### Changed
 - Node 21 => 22.
 - Configurations, inputs, outputs and default codes are now in a separated project.
 - Default codes and tests are now generated in the `easy`, `medium`, `hard` and `expert` sub-directories
 of the `lib` and `test` directories.
+- sinon 17.0.1 => 18.0.0.
 
 ## [2.0.0] - 2024-04-22
 ### Added