chore(deps): bump node-sass from 4.13.1 to 7.0.0 (#32)

Bumps [node-sass](https://github.com/sass/node-sass) from 4.13.1 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@v4.13.1...v7.0.0)

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

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

client/package.json

@@ -18,7 +18,7 @@
     "easy-peasy": "^3.0.0",
     "formik": "^2.0.3",
     "lodash": "^4.17.21",
-    "node-sass": "^4.13.1",
+    "node-sass": "^7.0.0",
     "prop-types": "^15.7.2",
     "rc-slider": "^8.6.13",
     "react": "^16.8.6",