upd: node-sass 4.13.1

package.json

@@ -111,7 +111,7 @@
         "moment": "2.22.2",
         "node-filelist": "^1.0.0",
         "node-notifier": "5.2.1",
-        "node-sass": "4.9.3",
+        "node-sass": "4.13.1",
         "npm-run-all": "^4.1.5",
         "nyc": "10.0.0",
         "offline-plugin": "^5.0.6",