[Filesystem] fix wrong method call casing

Author: azjezz

Filesystem.php

@@ -572,7 +572,7 @@ public function mirror($originDir, $targetDir, \Traversable $iterator = null, $o
         $targetDirInfo = new \SplFileInfo($targetDir);
 
         foreach ($iterator as $file) {
-            if ($file->getPathName() === $targetDir || $file->getRealPath() === $targetDir || 0 === strpos($file->getRealPath(), $targetDirInfo->getRealPath())) {
+            if ($file->getPathname() === $targetDir || $file->getRealPath() === $targetDir || 0 === strpos($file->getRealPath(), $targetDirInfo->getRealPath())) {
                 continue;
             }