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:development
...

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

Author: dependabot[bot]

package.json

@@ -66,7 +66,7 @@
         "html-webpack-plugin": "^3.2.0",
         "image-webpack-loader": "^5.0.0",
         "imagemin-svgo": "^7.0.0",
-        "node-sass": "^4.13.1",
+        "node-sass": "^7.0.0",
         "pug": "^2.0.3",
         "pug-plain-loader": "^1.0.0",
         "sass-loader": "^7.0.3",