fix test matrix

Author: swapnilsarwe

.github/workflows/tests.yml

@@ -10,8 +10,8 @@ jobs:
     strategy:
       fail-fast: true
       matrix:
-        php: [7.4, '8.0', 8.1, 8.2, 8.3]
-        laravel: [8, 9, 10, 11]
+        php: [7.4, '8.0', 8.1, 8.2, 8.3, 8.4]
+        laravel: [8, 9, 10, 11, 12]
         exclude:
           - php: 7.4
             laravel: 9