chore(deps): update dependency eslint to v9.21.0 (#25)

Co-authored-by: pactflow-renovate-bot[bot] <186667433+pactflow-renovate-bot[bot]@users.noreply.github.com>

Author: pactflow-renovate-bot[bot]

package-lock.json

@@ -14,7 +14,7 @@
   },
   "devDependencies": {
     "@pact-foundation/pact": "14.0.0",
-    "eslint": "9.20.1",
+    "eslint": "9.21.0",
     "jest": "29.7.0",
     "absolute-version": "2.0.0"
   },