Bump eslint-plugin-vue from 9.18.1 to 9.21.1

Bumps [eslint-plugin-vue](https://github.com/vuejs/eslint-plugin-vue) from 9.18.1 to 9.21.1.
- [Release notes](https://github.com/vuejs/eslint-plugin-vue/releases)
- [Commits](vuejs/eslint-plugin-vue@v9.18.1...v9.21.1)

---
updated-dependencies:
- dependency-name: eslint-plugin-vue
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -25,7 +25,7 @@
     "child-process": "^1.0.2",
     "css-loader": "^6.8.1",
     "eslint": "^8.53.0",
-    "eslint-plugin-vue": "^9.18.1",
+    "eslint-plugin-vue": "^9.21.1",
     "html-webpack-plugin": "^5.5.3",
     "mocha": "^10.2.0",
     "postcss": "^8.4.31",