fix: node_modules/diff/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-HTTPPROXYMIDDLEWARE-8229906

node_modules/diff/package.json

@@ -83,7 +83,7 @@
     "rollup-plugin-babel": "^4.2.0",
     "semver": "^7.3.2",
     "webpack": "^4.28.3",
-    "webpack-dev-server": "^3.1.14"
+    "webpack-dev-server": "^5.2.0"
   },
   "optionalDependencies": {}
 }