chore: add php 8.4 support

Author: adbario

.github/workflows/tests.yml

@@ -9,15 +9,15 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     strategy:
       matrix:
-        php: ['7.4', '8.0', '8.1', '8.2', '8.3']
+        php: ['7.4', '8.0', '8.1', '8.2', '8.3', '8.4']
         experimental: [false]
         include:
-          - php: '8.3'
+          - php: '8.4'
             analysis: true
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up PHP ${{ matrix.php }}
         uses: shivammathur/setup-php@v2

composer.json

@@ -17,7 +17,7 @@
     "require-dev": {
         "phpunit/phpunit": "^9.5",
         "squizlabs/php_codesniffer": "^3.7",
-        "phpstan/phpstan": "^1.8"
+        "phpstan/phpstan": "^2.1"
     },
     "autoload": {
         "files": [