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:production
...

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

Author: dependabot[bot]

package.json

@@ -14,7 +14,7 @@
     "expose-loader": "^0.7.5",
     "file-loader": "^3.0.1",
     "mini-css-extract-plugin": "^0.6.0",
-    "node-sass": "^4.12.0",
+    "node-sass": "^7.0.0",
     "raml2html": "^7.2.2",
     "raml2html-plain-theme": "^0.1.6",
     "sass-loader": "^7.1.0",