Added the onBanReach Function

[DiogoMarques2003]

Checklist

• [x] run npm run test and npm run benchmark
• [x] tests and/or benchmarks are included
• [x] documentation is changed or added
• [x] commit message and code follows the Developer's Certification of Origin and the Code of conduct

[DiogoMarques2003]

Can anyone check why the tests don't pass ? In my pc is working ...

[Eomm]

You can check it here: https://github.com/fastify/fastify-rate-limit/runs/7425780475?check_suite_focus=true

spoiler: run npm run lint:fix and it should fix the issue

[DiogoMarques2003]

@Eomm done