Use make-dir instead of mkdirp

[sudo-suhas]

Switch out mkdirp in favor of make-dir. make-dir is promise ready and does not need to be promisified using bluebird. More advantages here - https://github.com/sindresorhus/make-dir

[wtgtybhertgeghgtwtg]

Why did this get reverted if make-dir is still in package.json?

[sudo-suhas]

Hey @wtgtybhertgeghgtwtg, thank you for noticing that and bringing it to our attention. I think mkdirp must have been added back by mistake. Would you be interested in submitting a pull request which fixes this? You only need to change src/utils.fs.js, src/validateCache.js and remove mkdirp from package.json.

[asfktz]

Nice 👍 👍