chore(deps-dev): 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:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -102,7 +102,7 @@
     "jest": "24.8.0",
     "madge": "5.0.1",
     "marked": "4.0.10",
-    "node-sass": "6.0.1",
+    "node-sass": "7.0.0",
     "null-loader": "4.0.1",
     "path-to-regexp": "3.2.0",
     "puppeteer": "3.0.0",