Bring dependencies to a working state

package.json

@@ -30,11 +30,11 @@
     "eslint-plugin-prettier": "^3.1.0",
     "eslint-plugin-vue": "^5.0.0",
     "lint-staged": "^8.1.5",
-    "node-sass": "^4.9.0",
     "prerender-spa-plugin": "^3.4.0",
     "prettier": "^1.18.2",
     "purecss": "^1.0.0",
     "raw-loader": "^3.1.0",
+    "sass": "^1.49.7",
     "sass-loader": "^7.1.0",
     "vue-template-compiler": "^2.6.10"
   },