Update PHP minimum version to 8.4 in pipeline and composer.json

Co-authored-by: overtrue <[email protected]>

Author: Copilot

.github/workflows/ci.yml

@@ -13,14 +13,16 @@ jobs:
       - uses: actions/checkout@v2
       - name: Setup PHP environment
         uses: shivammathur/setup-php@v2
+        with:
+          php-version: 8.4
       - name: Install dependencies
         run: composer install
       - name: PHPCSFixer check
         run: composer check-style
   phpunit:
     strategy:
       matrix:
-        php_version: [8.0, 8.1, 8.2]
+        php_version: [8.4]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2

composer.json

@@ -9,6 +9,7 @@
     }
   ],
   "require": {
+    "php": "^8.4",
     "laravel/framework": "^12.0",
     "phpstan/phpstan": "^2.0"
   },