prepare release

Author: dbu

CHANGELOG.md

@@ -7,7 +7,7 @@ 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).
 
 
-## [3.1.2] - 2025-11-11
+## [3.1.2] - 2025-12-08
 
 - Allow PHPUnit > 9
 - Deprecate PhpUnitBackwardCompatibleTrait