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](sass/node-sass@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

@@ -30,7 +30,7 @@
     "file-loader": "^6.2.0",
     "html-loader": "^1.3.2",
     "html-webpack-plugin": "4.5.1",
-    "node-sass": "^5.0.0",
+    "node-sass": "^7.0.0",
     "sass-loader": "^10.1.1",
     "style-loader": "^2.0.0",
     "ts-loader": "^8.0.14",