CS fixes & upgrading cs fixer config

tests/Monolog/Processor/UidProcessorTest.php

@@ -24,6 +24,7 @@ class UidProcessorTest extends TestCase
         $record = $processor($this->getRecord());
         $this->assertArrayHasKey('uid', $record['extra']);
     }
+
     public function testGetUid()
     {
         $processor = new UidProcessor(10);