Bump node-sass from 6.0.1 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 6.0.1 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@v6.0.1...v7.0.0)

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

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

package.json

@@ -30,7 +30,7 @@
     "from-exponential": "^1.1.1",
     "intl": "^1.2.5",
     "lodash": "^4.17.21",
-    "node-sass": "^6.0.1",
+    "node-sass": "^7.0.0",
     "node-watch": "^0.7.1",
     "notistack": "^1.0.10",
     "react": "^16.14.0",