Are there plans to support Hapi v21?

As well as updating the dev dependency to hapi v21 [here](https://github.com/pinojs/hapi-pino/blob/master/package.json#L24) it seems like the types dependency of `"@types/hapi__hapi": "^20.0.10"` should be removed, since the types are now included with the core library of Hapi since v21: https://github.com/hapijs/hapi/tree/master/lib/types

Would I be able to help by opening a PR to take care of this? Looks like there's a need to cut a new major version of hapi-pino (v12) which will work with Hapi v21 typescript projects.

Start in package.json at the Hapi development dependency referenced on line 24, then inspect the @types/hapi__hapi dependency and the repository's versioning setup. Confirm the dependency changes needed for Hapi v21 and that the resulting release is prepared as hapi-pino v12.

Written by the indexing model from the issue text.