add ESLint v9 to devDependencies

Author: mdjermanovic

package.json

@@ -57,7 +57,7 @@
     "@typescript-eslint/parser": "^2.34.0 || ^3.10.1 || ^4.0.0 || ^5.0.0",
     "aud": "^2.0.4",
     "babel-eslint": "^8 || ^9 || ^10.1.0",
-    "eslint": "^3 || ^4 || ^5 || ^6 || ^7 || ^8",
+    "eslint": "^3 || ^4 || ^5 || ^6 || ^7 || ^8 || ^9",
     "eslint-config-airbnb-base": "^15.0.0",
     "eslint-doc-generator": "^1.7.0",
     "eslint-plugin-eslint-plugin": "^2.3.0 || ^3.5.3 || ^4.0.1 || ^5.0.5",