substack/node-mkdirp — pull request #60 by KidsKilla (2014-07-21 21:13:02+00:00)
Title: replace octal literals with `parseInt(NNN, 8)`

1) octal literals are deprecated
https://developer.mozilla.org/ru/docs/Web/JavaScript/Reference/Global_Objects/parseInt#ECMAScript_5_removes_octal_interpretation

2) there is the only option to work with ES6 harmony in node: --use-strict