Bump node-sass from 4.13.0 to 4.13.1 (#4795)

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-preview[bot] <support@dependabot.com>

package.json

@@ -177,7 +177,7 @@
     "minimist": "1.2.0",
     "ngx-i18nsupport": "0.17.1",
     "node-gyp": "6.1.0",
-    "node-sass": "4.13.0",
+    "node-sass": "4.13.1",
     "q": "1.5.1",
     "raw-loader": "4.0.0",
     "run-node": "1.0.0",