fix(ui): use fs-extra instead of mkdirp

Author: Guillaume Chau

packages/@vue/cli-ui/package.json

@@ -24,7 +24,6 @@
     "lodash.merge": "^4.6.1",
     "lowdb": "^1.0.0",
     "lru-cache": "^4.1.2",
-    "mkdirp": "^0.5.1",
     "node-notifier": "^5.2.1",
     "semver": "^5.5.0",
     "shortid": "^2.2.8",

packages/@vue/cli-ui/src/graphql-api/utils/db.js

@@ -1,9 +1,9 @@
 const Lowdb = require('lowdb')
 const FileSync = require('lowdb/adapters/FileSync')
-const mkdirp = require('mkdirp')
+const fs = require('fs-extra')
 const { resolve } = require('path')
 
-mkdirp(resolve(__dirname, '../../../live'))
+fs.ensureDirSync(resolve(__dirname, '../../../live'))
 
 const db = new Lowdb(new FileSync(resolve(__dirname, '../../../live/db.json')))