Add testing for laravel 9 (#7)

* Test Laravel 9 with testbench 7
* Add hours to flush method

.github/workflows/tests.yml

@@ -21,6 +21,8 @@ jobs:
                   - laravel: 8.*
                     testbench: 6.*
                     laravel-constraint: ^8.18.1
+                  - laravel: 9.*
+                    testbench: 7.*
 
         name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.dependency-version }} - ${{ matrix.os }}
 

src/FileFailedJobProvider.php

@@ -103,7 +103,7 @@ public function forget($id)
      *
      * @return void
      */
-    public function flush()
+    public function flush($hours = null)
     {
         File::delete($this->storagePath);
     }