Build(deps-dev): bump eslint-plugin-vue from 8.3.0 to 8.4.0

Bumps [eslint-plugin-vue](https://github.com/vuejs/eslint-plugin-vue) from 8.3.0 to 8.4.0.
- [Release notes](https://github.com/vuejs/eslint-plugin-vue/releases)
- [Commits](https://github.com/vuejs/eslint-plugin-vue/compare/v8.3.0...v8.4.0)

package.json

@@ -68,7 +68,7 @@
     "eslint-loader": "^4.0.2",
     "eslint-plugin-import": "^2.25.4",
     "eslint-plugin-prettier": "^4.0.0",
-    "eslint-plugin-vue": "^8.3.0",
+    "eslint-plugin-vue": "^8.4.0",
     "prettier": "^2.5.1",
     "wait-on": "^6.0.0"
   },