Bump sass-loader from 13.0.2 to 13.1.0

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 13.0.2 to 13.1.0.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/webpack-contrib/sass-loader/compare/v13.0.2...v13.1.0)

---
updated-dependencies:
- dependency-name: sass-loader
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -35,7 +35,7 @@
     "propagating-hammerjs": "^2.0.1",
     "rails-erb-loader": "^5.5.2",
     "sass": "^1.55.0",
-    "sass-loader": "^13.0.2",
+    "sass-loader": "^13.1.0",
     "shakapacker": "6.5.2",
     "sortablejs": "^1.15.0",
     "sorttable": "^1.0.2",