test/mkdirp/chmod.test: fix mkdir require
test/mkdirp/chmod.test: fix mkdir require

snuggles08/node-fs-extra,SciSpike/node-fs-extra,KoryNunn/node-fs-extra,reggi/node-fs-extra,jprichardson/node-fs-extra,JanMattner/node-fs-extra,Narigo/node-fs-extra