deps(dev): Upgrade to eslint 9

Author: phated

.eslintignore

@@ -0,0 +1,5 @@
+var gulpConfig = require("eslint-config-gulp");
+
+module.exports = [
+  ...gulpConfig,
+];

.eslintrc

@@ -27,9 +27,8 @@
     "test": "nyc mocha --async-only"
   },
   "devDependencies": {
-    "eslint": "^7.32.0",
-    "eslint-config-gulp": "^5.0.1",
-    "eslint-plugin-node": "^11.1.0",
+    "eslint": "^9.39.2",
+    "eslint-config-gulp": "^6.0.0",
     "expect": "^27.3.1",
     "mocha": "^8.4.0",
     "nyc": "^15.1.0",