Test for PHP 8.3 and PHP 8.4

Author: willemverspyck

.github/workflows/push.yml

@@ -6,9 +6,9 @@ jobs:
     strategy:
       matrix:
         operating-system: ['ubuntu-latest']
-        php-versions: ['8.1', '8.2']
+        php-versions: ['8.1', '8.2', '8.3', '8.4']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with: