fix: assets/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-8172694
- https://snyk.io/vuln/SNYK-JS-MINIMIST-559764

assets/package.json

@@ -28,7 +28,7 @@
     "datatables.net-bs4": "1.10.16",
     "dom-classes": "^1.0.0",
     "dotenv-webpack": "^1.5.5",
-    "eslint": "^4.18.2",
+    "eslint": "^9.0.0",
     "eslint-config-airbnb-base": "^12.1.0",
     "eslint-config-prettier": "^2.9.0",
     "eslint-plugin-import": "^2.9.0",
@@ -73,7 +73,7 @@
     "turbolinks": "^5.1.1",
     "uglifyjs-webpack-plugin": "^1.2.2",
     "url-loader": "^1.0.1",
-    "webpack": "^4.20.2",
+    "webpack": "^5.0.0",
     "webpack-cli": "^2.0.11",
     "webpack-merge": "^4.1.2",
     "workbox-webpack-plugin": "^2.1.3"