Update dependency @types/node to ^20.19.18

Author: renovate[bot]

vsts-msbuild-helper/v1/package-lock.json

@@ -15,7 +15,7 @@
     "build": "tsc && tslint --project . && npm dedupe && npm prune --production"
   },
   "devDependencies": {
-    "@types/node": "^20.19.13",
+    "@types/node": "^20.19.18",
     "tslint": "^6.1.3",
     "typescript": "^5.9.2",
     "typestrict": "^1.0.2"