chore(deps): update dependency eslint to v9

Author: renovate[bot]

package.json

@@ -53,7 +53,7 @@
     "@sourcegraph/prettierrc": "^3.0.3",
     "@sourcegraph/tsconfig": "^4.0.1",
     "@types/mocha": "9.1.1",
-    "eslint": "^7.32.0",
+    "eslint": "^9.23.0",
     "husky": "^3.0.2",
     "mocha": "^9.2.2",
     "nyc": "^15.1.0",