chore(deps-dev): bump less-loader from 8.1.1 to 9.0.0 (#288)

Bumps [less-loader](https://github.com/webpack-contrib/less-loader) from 8.1.1 to 9.0.0.
- [Release notes](https://github.com/webpack-contrib/less-loader/releases)
- [Changelog](https://github.com/webpack-contrib/less-loader/blob/master/CHANGELOG.md)
- [Commits](webpack-contrib/less-loader@v8.1.1...v9.0.0)

---
updated-dependencies:
- dependency-name: less-loader
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package.json

@@ -43,7 +43,7 @@
     "eslint-plugin-import": "^2.20.2",
     "eslint-plugin-vue": "^7.1.0",
     "less": "^4.1.1",
-    "less-loader": "^8.0.0",
+    "less-loader": "^9.0.0",
     "vue": "^2.6.11",
     "vue-router": "^3.3.4",
     "vue-template-compiler": "^2.6.11"