chore: upgrade dependencies and toolchain (2026-05)

.github/workflows/php.yml

@@ -19,12 +19,18 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Setup PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: "8.4"
+          coverage: none
+
       - name: Validate composer.json and composer.lock
         run: composer validate --strict
 
       - name: Cache Composer packages
         id: composer-cache
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: vendor
           key: ${{ runner.os }}-php-${{ hashFiles('**/composer.lock') }}

.gitignore

@@ -3,3 +3,7 @@
 
 # Composer lock file
 composer.lock
+
+# PHPUnit
+.phpunit.result.cache
+.phpunit.cache/

.mise.toml

@@ -0,0 +1,2 @@
+[tools]
+php = "8.5.6"

composer.json

@@ -5,12 +5,12 @@
   "minimum-stability": "stable",
   "license": "MIT",
   "require": {
-    "php": ">=7.4",
+    "php": ">=8.2",
     "guzzlehttp/guzzle": "^7.9",
     "ramsey/uuid": "^4.7"
   },
   "require-dev": {
-    "phpunit/phpunit": "^9.0"
+    "phpunit/phpunit": "^11.0"
   },
   "autoload": {
     "psr-4": {