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>

package.json

@@ -95,7 +95,7 @@
     "mixpanel": "0.5.0",
     "net": "1.0.2",
     "node-cache": "^4.2.0",
-    "node-sass": "^4.14.1",
+    "node-sass": "^7.0.0",
     "os": "0.1.1",
     "picturefill": "3.0.2",
     "qrious": "^4.0.2",