Update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -48,7 +48,7 @@
   "devDependencies": {
     "chai": "4.3.4",
     "coveralls": "3.1.0",
-    "eslint": "6.8.0",
+    "eslint": "9.22.0",
     "eslint-config-prettier": "6.15.0",
     "eslint-plugin-chai-expect": "2.2.0",
     "eslint-plugin-chai-friendly": "0.6.0",