CS fixes & upgrading cs fixer config

tests/Monolog/Processor/PsrLogMessageProcessorTest.php

@@ -22,7 +22,7 @@ class PsrLogMessageProcessorTest extends \PHPUnit_Framework_TestCase
 
         $message = $proc(array(
             'message' => '{foo}',
-            'context' => array('foo' => $val)
+            'context' => array('foo' => $val),
         ));
         $this->assertEquals($expected, $message['message']);
     }