Allow PHP 8.3 usage (#11)

Author: FabianSchmick

.github/workflows/tests.yml

@@ -22,6 +22,8 @@ jobs:
                     - { php-version: 7.4, symfony-locked-version: 4.4.*, dependency-version: prefer-stable }
                     - { php-version: 7.4, symfony-locked-version: none, dependency-version: prefer-stable }
                     - { php-version: 8.1, symfony-locked-version: none, dependency-version: prefer-stable }
+                    - { php-version: 8.2, symfony-locked-version: none, dependency-version: prefer-stable }
+                    - { php-version: 8.3, symfony-locked-version: none, dependency-version: prefer-stable }
         name: PHPUnit (PHP ${{matrix.php-version}}, Symfony Version Lock ${{ matrix.symfony-locked-version }}, ${{ matrix.dependency-version }})
         steps:
             -   uses: shivammathur/setup-php@v2

composer.json

@@ -13,7 +13,7 @@
     ],
 
     "require": {
-        "php": "7.2.*|7.3.*|7.4.*|8.0.*|8.1.*",
+        "php": "7.2.*|7.3.*|7.4.*|8.0.*|8.1.*|8.2.*|8.3.*",
         "symfony/config": "^3.4|^4.0|^5.0|^6.0",
         "symfony/dependency-injection": "^3.4|^4.0|^5.0|^6.0",
         "symfony/event-dispatcher": "^3.4|^4.0|^5.0|^6.0",