fixed: switch PHP 8.1 features

Author: pongee

CHANGELOG.md

@@ -4,9 +4,9 @@ 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).
 
-## [3.3.0] - 2024-12-31
-### Fixed
-- Use PHP 8.1 features
+## [4.0.0] - 2024-12-31
+### Changed
+- Switch to PHP 8.1
 
 ## [3.2.0] - 2022-03-05
 ### Added