CS fixes & upgrading cs fixer config

tests/Monolog/Handler/SwiftMailerHandlerTest.php

@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Monolog package.
+ *
+ * (c) Jordi Boggiano <j.boggiano@seld.be>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Monolog\Handler;
 
 use Monolog\Logger;
@@ -63,7 +72,8 @@ class SwiftMailerHandlerTest extends TestCase
         $handler->handleBatch($records);
     }
 
-    public function testMessageHaveUniqueId() {
+    public function testMessageHaveUniqueId()
+    {
         $messageTemplate = \Swift_Message::newInstance();
         $handler = new SwiftMailerHandler($this->mailer, $messageTemplate);