Restrict directories

Author: MGatner

src/.php-cs-fixer.dist.php

@@ -6,7 +6,10 @@
 
 $finder = Finder::create()
     ->files()
-    ->in(__DIR__)
+    ->in([
+        __DIR__ . '/app',
+        __DIR__ . '/tests',
+    ])
     ->exclude('build')
     ->append([__FILE__]);