chore(sniff): Refine PHPCodeSniffer configuration.

Author: shulard

.php_cs

@@ -0,0 +1,14 @@
+
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->exclude('vendor')
+    ->in(__DIR__)
+;
+
+return PhpCsFixer\Config::create()
+    ->setRules([
+         '@Symfony' => true,
+         'array_syntax' => ['syntax' => 'short'],
+    ])
+    ->setFinder($finder);