Bump node-sass from 4.9.4 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.9.4 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@v4.9.4...v7.0.0)

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

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

packages/react-impression/package.json

@@ -45,7 +45,7 @@
     "gulp-babel": "^8.0.0",
     "gulp-load-plugins": "^1.5.0",
     "minimist": "^1.2.3",
-    "node-sass": "4.9.4",
+    "node-sass": "7.0.0",
     "node-sass-package-importer": "^5.3.2",
     "npm-run-all": "^4.1.5",
     "rollup": "^2.45.2",