N°9319 increase php min. version to 8.2 (#887)

* Update minimum PHP version to 8.2
* Fix previous wrong resolution of merge conflict

lib/guzzlehttp/psr7/CHANGELOG.md

@@ -5,6 +5,23 @@ 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).
 
+## 2.9.0 - 2026-03-10
+
+### Added
+
+- Added nested array expansion support to `MultipartStream`
+- Added `@return static` to `MessageTrait` methods
+
+### Changed
+
+- Updated MIME type mappings
+
+## 2.8.1 - 2026-03-10
+
+### Fixed
+
+- Encode `+` signs in `Uri::withQueryValue()` and `Uri::withQueryValues()` to prevent them being interpreted as spaces
+
 ## 2.8.0 - 2025-08-23
 
 ### Added