build(deps-dev): bump sass-loader from 10.2.0 to 12.1.0

Bumps [sass-loader](https://github.com/webpack-contrib/sass-loader) from 10.2.0 to 12.1.0.
- [Release notes](https://github.com/webpack-contrib/sass-loader/releases)
- [Changelog](https://github.com/webpack-contrib/sass-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/sass-loader@v10.2.0...v12.1.0)

---
updated-dependencies:
- dependency-name: sass-loader
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -56,7 +56,7 @@
     "node-sass": "^6.0.0",
     "postcss-loader": "^4.3.0",
     "prettier": "^2.3.2",
-    "sass-loader": "^10.2.0",
+    "sass-loader": "^12.1.0",
     "style-loader": "^2.0.0",
     "stylelint": "^9.10.1",
     "stylelint-config-mass": "^1.0.2",