update testing matrix

Author: duncanmcclean

.github/workflows/test.yml

@@ -10,8 +10,8 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        php: [8.3, 8.4]
-        laravel: [12.*]
+        php: [8.3, 8.4, 8.5]
+        laravel: [12.*, 13.*]
         statamic: [^6.0]
     name: P${{ matrix.php }} - S${{ matrix.statamic }} - L${{ matrix.laravel }} - ubuntu-latest
     steps: