chore(deps): update dependency eslint to v9

Author: renovate[bot]

demo/package.json

@@ -39,7 +39,7 @@
     "@types/node": "22.10.2",
     "@typescript-eslint/eslint-plugin": "5.62.0",
     "@typescript-eslint/parser": "5.62.0",
-    "eslint": "8.57.1",
+    "eslint": "9.21.0",
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-prettier": "5.2.3",
     "fs": "0.0.1-security",

package.json

@@ -44,7 +44,7 @@
     "@types/nunjucks": "3.2.6",
     "@typescript-eslint/eslint-plugin": "5.62.0",
     "@typescript-eslint/parser": "5.62.0",
-    "eslint": "8.57.1",
+    "eslint": "9.21.0",
     "eslint-config-prettier": "9.1.0",
     "eslint-plugin-import": "2.31.0",
     "husky": "9.1.7",