Bump node-sass from 4.14.1 to 6.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.1 to 6.0.0.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](sass/node-sass@v4.14.1...v6.0.0)

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

Author: dependabot[bot]

package-lock.json

@@ -24,7 +24,7 @@
     "local-storage": "^2.0.0",
     "lodash": "^4.17.21",
     "mime-types": "^2.1.30",
-    "node-sass": "^4.14.1",
+    "node-sass": "^6.0.0",
     "react": "^17.0.1",
     "react-dom": "^17.0.1",
     "react-helmet": "^6.1.0",