chore: add vue as devDependencies

Author: krestaino

package.json

@@ -39,6 +39,7 @@
     "node-sass": "^4.13.1",
     "prettier": "^1.19.1",
     "sass-loader": "^8.0.2",
+    "vue": "^2.6.11",
     "webpack": "^4.41.5"
   }
 }