Link directory
Link each file in a directory recursively.
npm i -S link-dir# from -> to
link-dir . node_modules/my-package'use strict'
const linkDir = require('link-dir')
const path = require('path')
const cwd = process.cwd()
linkDir(path.join(cwd, 'src'), path.join(cwd, 'node_modules/src'))