fix: package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-TAR-6476909
- https://snyk.io/vuln/SNYK-JS-WEBPACKDEVMIDDLEWARE-6476555

package.json

@@ -117,7 +117,7 @@
     "standard": "^14.3.1",
     "start-server-and-test": "^1.11.3",
     "supertest": "^4.0.2",
-    "webpack-dev-middleware": "^3.7.2",
+    "webpack-dev-middleware": "^5.3.4",
     "website-scraper": "^4.2.0"
   },
   "scripts": {