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] <[email protected]>

Author: dependabot[bot]

package.json

@@ -15,7 +15,7 @@
     "expr-eval": "^2.0.2",
     "handlebars": "^4.7.7",
     "lodash": "^4.17.13",
-    "node-sass": "^4.14.1",
+    "node-sass": "^7.0.0",
     "prop-types": "^15.6.2",
     "react": "16.14",
     "react-audio-player": "^0.17.0",