chore(deps): update dependency @types/node to v20

Author: renovate[bot]

package-lock.json

@@ -30,7 +30,7 @@
     "@octokit/core": "^6.0.0",
     "@octokit/tsconfig": "^3.0.0",
     "@types/fetch-mock": "^7.3.7",
-    "@types/node": "^18.18.6",
+    "@types/node": "^20.0.0",
     "@vitest/coverage-v8": "^2.0.0",
     "@vitest/ui": "^2.0.0",
     "esbuild": "^0.23.0",