Update test.yml

Author: jfritschi

.github/workflows/test.yml

@@ -22,6 +22,8 @@ jobs:
             phpunit: '9'
           - php: '8.1'
             phpunit: '9'
+          - php: '8.2'
+            phpunit: '9'
     steps:
       - uses: actions/checkout@v2
       - uses: php-actions/composer@v6