Bump node-sass

Bumps [node-sass](https://github.com/sass/node-sass) from 4.13.0 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/v4.13.0...v7.0.0)

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

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

samples/demos/azure-sql-edge-demos/Wind Turbine Demo/webappsrc/SqlDbEdgeDemoWeb/SqlDbEdgeDemo.Web/ClientApp/package.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "node-sass": "^4.13.0",
+    "node-sass": "^7.0.0",
     "normalize.css": "^8.0.1",
     "react": "^16.11.0",
     "react-dom": "^16.11.0",