Different behavior of fs.readdirSync in node and skpm

Hello.
In node ```fs.readdirSync``` not traverse all directory tree.
In @skpm version  ```fs.readdirSync``` uses ```NSFileManagersubpathsAtPath:``` which according to the documentation:
"This method recurses the specified directory and its subdirectories. The method skips the “.” and “..” directories at each level of the recursion."
