chore(deps): replace dependency @tsconfig/node18 with @tsconfig/node20

Author: renovate[bot]

package-lock.json

@@ -57,7 +57,7 @@
 	},
 	"devDependencies": {
 		"@eslint/js": "9.39.1",
-		"@tsconfig/node18": "18.2.6",
+		"@tsconfig/node20": "20.1.0",
 		"@types/eslint__js": "8.42.3",
 		"@types/node": "22.13.9",
 		"ava": "6.4.1",