Bump node-sass from 4.14.0 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.0 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](sass/node-sass@v4.14.0...v7.0.0)

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

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

Author: dependabot[bot]

package.json

@@ -24,7 +24,7 @@
     "eslint-plugin-import": "2.20.2",
     "file-loader": "0.11.2",
     "html-webpack-plugin": "4.3.0",
-    "node-sass": "^4.14",
+    "node-sass": "^7.0",
     "object-assign": "4.1.1",
     "postcss-loader": "^2.0.6",
     "sass-loader": "^6.0.6",