⬆️ Bump node-sass from 4.12.0 to 4.13.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.12.0 to 4.13.0.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v4.12.0...v4.13.0)

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

package.json

@@ -34,7 +34,7 @@
     },
     "devDependencies": {
         "cypress": "^3.4.1",
-        "node-sass": "^4.12.0",
+        "node-sass": "^4.13.0",
         "sass-loader": "^7.3.1",
         "start-server-and-test": "^1.10.6"
     }