Bump node-sass from 4.14.1 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.1 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@v4.14.1...v7.0.0)

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

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

Author: dependabot[bot]

package.json

@@ -11,7 +11,7 @@
     "bulma": "^0.8.1",
     "core-js": "^3.6.4",
     "lodash.shuffle": "^4.2.0",
-    "node-sass": "^4.13.1",
+    "node-sass": "^7.0.0",
     "normalize.css": "^8.0.1",
     "sass-loader": "^8.0.2",
     "vue": "^2.6.11",