Modify github actions config

Author: bryanadamloh97

.github/workflows/ci-test.yml

@@ -9,8 +9,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [7.2, 7.3, 7.4]
-        laravel: [6.*, 7.*]
+        php: [7.2, 7.3, 7.4, 8.0]
+        laravel: [6.*, 7.*, 8.*]
 
     name: PHP${{ matrix.php }} - Laravel ${{ matrix.laravel }}