build: update mkdirp to 1.0.4

Author: mrholek

build/vendors-sass.js

@@ -76,11 +76,7 @@ const compileSass = (options = {}) => {
         console.warn(warning.toString())
       })
       // write the result to file
-      mkdirp(dirname(options.dest), err => {
-        if (err) {
-          throw err
-        }
-
+      mkdirp(dirname(options.dest)).then(() => {
         // create .css file
         fs.writeFile(options.dest, result.css, err => {
           if (err) {

package.json

@@ -108,6 +108,7 @@
     "js-beautify": "^1.13.0",
     "jsdom": "^16.4.0",
     "minimist": "^1.2.5",
+    "mkdirp": "^1.0.4",
     "node-sass": "^5.0.0",
     "nodemon": "^2.0.6",
     "npm-run-all": "^4.1.5",