build(deps-dev): bump node-sass from 5.0.0 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 5.0.0 to 7.0.0.
- [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/v5.0.0...v7.0.0)

---
updated-dependencies:
- dependency-name: node-sass
  dependency-type: direct:development
...

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

package.json

@@ -52,7 +52,7 @@
   "devDependencies": {
     "clean-css-cli": "^5.2.2",
     "concat": "^1.0.3",
-    "node-sass": "^5.0.0",
+    "node-sass": "^7.0.0",
     "npm-run-all": "^4.1.5",
     "postcss": "^8.2.8",
     "postcss-cli": "^8.3.1",