Add L13 into v6 workflow

Author: drbyte

.github/workflows/run-tests.yml

@@ -10,16 +10,20 @@ jobs:
       fail-fast: false
       matrix:
         php: [8.5, 8.4, 8.3, 8.2]
-        laravel: ["^12.0", "^11.0", "^10.0"]
-        dependency-version: [prefer-lowest, prefer-stable]
+        laravel: ["^13.0", "^12.0", "^11.0", "^10.0"]
+        dependency-version: [prefer-stable, prefer-lowest]
         include:
+          - laravel: "^13.0"
+            testbench: 11.*
           - laravel: "^12.0"
             testbench: 10.*
           - laravel: "^11.0"
             testbench: 9.*
           - laravel: "^10.0"
             testbench: 8.*
         exclude:
+            - laravel: "^13.0"
+              php: 8.2
             - laravel: "^11.0"
               dependency-version: prefer-lowest
             - laravel: "^10.0"