chore(deps-dev): bump node-sass from 4.14.1 to 6.0.1

Bumps [node-sass](https://github.com/sass/node-sass) from 4.14.1 to 6.0.1.
- [Release notes](https://github.com/sass/node-sass/releases)
- [Changelog](https://github.com/sass/node-sass/blob/master/CHANGELOG.md)
- [Commits](https://github.com/sass/node-sass/compare/v4.14.1...v6.0.1)

---
updated-dependencies:
- dependency-name: node-sass
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

package.json

@@ -55,7 +55,7 @@
     "babel-eslint": "^10.1.0",
     "eslint": "^6.7.2",
     "eslint-plugin-vue": "^6.2.2",
-    "node-sass": "^4.12.0",
+    "node-sass": "^6.0.1",
     "sass-loader": "^8.0.2",
     "vue-template-compiler": "^2.6.11"
   },