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] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -35,7 +35,7 @@
     "codecov": "^3.8.3",
     "eslint": "^6.7.2",
     "eslint-plugin-vue": "^6.2.2",
-    "node-sass": "^6.0.0",
+    "node-sass": "^7.0.0",
     "sass-loader": "^10.2.0",
     "vue-template-compiler": "^2.6.14"
   },