FIX laravel 13 support

Author: enricodelazzari

.github/workflows/run-tests.yml

@@ -37,11 +37,11 @@ jobs:
         stability: [prefer-lowest, prefer-stable]
         include:
           - laravel: 13.*
-            testbench: ^11.0
+            testbench: 11.*
           - laravel: 12.*
-            testbench: ^10.0
+            testbench: 10.*
           - laravel: 11.*
-            testbench: ^9.1.0
+            testbench: 9.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}