minor changes made to make compatible with code structure

app/Events/Purchase/BillReminded.php

@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Events\Purchase;
+
+use Illuminate\Queue\SerializesModels;
+
+class BillReminded
+{
+    use SerializesModels;
+
+    public $bill;
+
+    /**
+     * Create a new event instance.
+     *
+     * @param $bill
+     */
+    public function __construct($bill)
+    {
+        $this->bill = $bill;
+    }
+}