Update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -21,7 +21,7 @@
     "url": "https://github.com/taskcluster/taskcluster-lib-scopes.git"
   },
   "devDependencies": {
-    "eslint": "^7.0.0",
+    "eslint": "^9.0.0",
     "eslint-config-taskcluster": "^4.0.0",
     "lodash": "^4.17.15",
     "mocha": "8.4.0"