Bump node-sass from 4.13.1 to 7.0.0

Bumps [node-sass](https://github.com/sass/node-sass) from 4.13.1 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@v4.13.1...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

@@ -53,7 +53,7 @@
     "eslint-plugin-vue": "5.2.2",
     "html-webpack-plugin": "3.2.0",
     "mockjs": "1.0.1-beta3",
-    "node-sass": "^4.14.1",
+    "node-sass": "^7.0.0",
     "runjs": "^4.3.2",
     "sass-loader": "^7.1.0",
     "script-ext-html-webpack-plugin": "2.1.3",