Install node sass to resolve issue while running npm run dev

package.json

@@ -10,7 +10,7 @@
     "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
   },
   "devDependencies": {
-    "axios": "^0.17",
+    "axios": "^0.18",
     "bootstrap-sass": "^3.3.7",
     "cross-env": "^5.1",
     "font-awesome": "^4.7.0",
@@ -27,6 +27,7 @@
     "datatables.net-buttons": "^1.3.1",
     "moment": "^2.18.1",
     "nestable2": "^1.5.0",
+    "node-sass": "^4.9.0",
     "pluralize": "^7.0.0",
     "select2": "^4.0.4",
     "tinymce": "^4.5.8"