Update node-sass

package.json

@@ -58,7 +58,7 @@
     "imagemin-mozjpeg": "~7.0.0",
     "imagemin-webpack-plugin": "~2.2.0",
     "import-glob": "~1.5",
-    "node-sass": "~4.14.1",
+    "node-sass": "^5.0.0",
     "postcss-loader": "~2.1.0",
     "postcss-safe-parser": "~3.0",
     "purgecss-webpack-plugin": "^3.0.0",