Bump node-sass from 4.13.1 to 7.0.0

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](https://github.com/sass/node-sass/compare/v4.13.1...v7.0.0)

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

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

package.json

@@ -44,7 +44,7 @@
     "karma-cljs-test": "^0.1.0",
     "karma-firefox-launcher": "^1.2.0",
     "karma-notify-reporter": "^1.1.0",
-    "node-sass": "^4.13.1",
+    "node-sass": "^7.0.0",
     "npm-run-all": "^4.1.5",
     "react-flip-move": "^3.0.3",
     "react-highlight.js": "^1.0.7",