build script fix

package.json

@@ -4,7 +4,7 @@
   "description": "Premium and Open Source dashboard template with responsive and high quality UI.",
   "scripts": {
     "start": "npm-run-all clean css-main js-compile-standalone --parallel browsersync watch html-watch",
-    "build": "npm-run-all html-build css js",
+    "build": "npm-run-all clean html-build css js",
     "bundlesize": "bundlesize",
     "browsersync": "node build/browsersync.js",
     "html-watch": "JEKYLL_ENV=development bundle exec jekyll build --watch",