Bump node-sass from 4.13.0 to 4.13.1

Bumps [node-sass](https://github.com/sass/node-sass) from 4.13.0 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@v4.13.0...v4.13.1)

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

package.json

@@ -99,7 +99,7 @@
         "@testing-library/react": "^11.2.5",
         "@testing-library/user-event": "^12.8.3",
         "copyfiles": "2.1.1",
-        "node-sass": "4.13.0",
+        "node-sass": "4.13.1",
         "prettier": "1.19.1",
         "serve": "11.2.0",
         "webpack-cli": "3.3.11",