Bump node-sass from 4.9.2 to 4.13.1

Bumps [node-sass](https://github.com/sass/node-sass) from 4.9.2 to 4.13.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](sass/node-sass@v4.9.2...v4.13.1)

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -34,7 +34,7 @@
     "html-webpack-plugin": "^2.30.1",
     "lottie-web": "^5.2.0",
     "node-notifier": "^8.0.1",
-    "node-sass": "^4.9.2",
+    "node-sass": "^4.13.1",
     "optimize-css-assets-webpack-plugin": "^3.2.0",
     "ora": "^1.2.0",
     "popper": "^1.0.1",