Update for Fastify v5

[synapse]

Ref: fastify/fastify#5116

Checklist

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

[gurgunday]

Ok, will start merging now, but just for consistency, I've so far kept the .taprc files and haven't moved tap options to package.json as so far we've preferred explicit config files

So it would be great if you could keep .taprc, thanks

https://github.com/fastify/fastify-cookie/blob/next/.taprc
https://github.com/fastify/fastify-rate-limit/blob/next/.taprc

[mcollina]

lgtm

[mcollina]

CI is failing

[gurgunday]

Hey @synapse sorry for this, but master had a breaking change and it requires some refactoring, do you have time to take a look?

[gurgunday]

lgtm, thank you!