Bump node-sass from 4.13.0 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.13.0 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/v4.13.0...v7.0.0)

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

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

package.json

@@ -15,7 +15,7 @@
     "@stripe/stripe-js": "^1.8.0",
     "mongoose": "^5.9.24",
     "node-fetch": "^2.6.0",
-    "node-sass": "^4.13.0",
+    "node-sass": "^7.0.0",
     "stripe": "^8.76.0",
     "vue": "~2.6",
     "vue-router": "~3.0",