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](sass/node-sass@v4.12.0...v4.13.0)

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

package.json

@@ -33,7 +33,7 @@
     "css-loader": "^3.2.0",
     "eslint": "^6.6.0",
     "eslint-plugin-import": "^2.18.2",
-    "node-sass": "^4.12.0",
+    "node-sass": "^4.13.0",
     "puppeteer": "^2.0.0",
     "sass-loader": "^7.3.1",
     "style-loader": "^1.0.0",