PHP versions list is updated to include new and upcoming versions

Author: FlyingDR

.github/workflows/phpunit.yml

@@ -22,16 +22,13 @@ jobs:
                     - php: '8.0'
                     - php: '8.1'
                     - php: '8.2'
+                    - php: '8.3'
+                    - php: '8.4'
 
         steps:
             -   name: Checkout
                 uses: actions/checkout@v3
 
-            -   name: Configure for PHP >= 8.2
-                if: "matrix.php >= '8.2'"
-                run: |
-                    composer config platform.php 8.1.99
-
             -   name: Install PHP with extensions
                 uses: shivammathur/setup-php@v2
                 with: