add new env variable

app/Listeners/Update/V20/Version207.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Listeners\Update\V20;
+
+use App\Abstracts\Listeners\Update as Listener;
+use App\Events\Install\UpdateFinished as Event;
+use App\Utilities\Installer;
+
+class Version207 extends Listener
+{
+    const ALIAS = 'core';
+
+    const VERSION = '2.0.7';
+
+    /**
+     * Handle the event.
+     *
+     * @param  $event
+     * @return void
+     */
+    public function handle(Event $event)
+    {
+        if ($this->skipThisUpdate($event)) {
+            return;
+        }
+
+        // Update .env file
+        Installer::updateEnv([
+            'MAIL_MAILER'       =>  env('MAIL_DRIVER'),
+        ]);
+    }
+}