Remove Laravel 8

Author: andreia

.github/workflows/run-tests-l8.yml

@@ -10,13 +10,11 @@ jobs:
       fail-fast: false
       matrix:
         php: [8.1, 8.0]
-        laravel: [9.*, 8.*]
+        laravel: [9.*]
         dependency-version: [prefer-lowest, prefer-stable]
         include:
           - laravel: 9.*
             testbench: 7.*
-          - laravel: 8.*
-            testbench: 6.*
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }}