Bump filemanager-webpack-plugin from 3.1.1 to 4.0.0

Bumps [filemanager-webpack-plugin](https://github.com/gregnb/filemanager-webpack-plugin) from 3.1.1 to 4.0.0.
- [Release notes](https://github.com/gregnb/filemanager-webpack-plugin/releases)
- [Changelog](https://github.com/gregnb/filemanager-webpack-plugin/blob/master/CHANGELOG.md)
- [Commits](gregnb/filemanager-webpack-plugin@v3.1.1...v4.0.0)

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

package.json

@@ -73,7 +73,7 @@
     "eslint-config-cmyr": "^1.1.0",
     "eslint-plugin-nuxt": "^2.0.0",
     "eslint-plugin-vue": "^7.5.0",
-    "filemanager-webpack-plugin": "^3.1.0",
+    "filemanager-webpack-plugin": "^4.0.0",
     "html-loader": "^1.3.2",
     "husky": "^5.0.9",
     "lint-staged": "^10.5.3",