build: fix lost pkg

Author: Scrum

package.json

@@ -40,6 +40,7 @@
   "dependencies": {
     "@babel/runtime": "^7.6.0",
     "deepmerge": "^4.0.0",
+    "js-beautify": "^1.10.2",
     "posthtml-parser": "^0.4.1",
     "posthtml-render": "^1.1.5"
   },