Add tests for PHP 8.5

Author: tuupola

.github/workflows/tests.yml

@@ -6,7 +6,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ubuntu-latest]
-        php-versions: ["7.2", "7.3", "7.4", "8.0", "8.1", "8.2", "8.3", "8.4"]
+        php-versions: ["7.2", "7.3", "7.4", "8.0", "8.1", "8.2", "8.3", "8.4", "8.5"]
         dependency-versions: ["highest", "lowest"]
     runs-on: ${{ matrix.operating-system }}
     steps: