Updating for v5

[nrayburn-tech]

Prerequisites

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Issue

I'm looking to update this repo for v5. fastify/fastify#5116

From what I can tell, all that needs to be updated is pin tap to "16.3.9". I'm not seeing any workflow changes that need to be made, changes for dropping node <= 16, or other dependency updates to be made. If I'm missing something, please let me know.

[jsumners]

Actually, there's going to be at least one change to the CI configuration. See footnote 1 in fastify/fastify#5116.

I have created the https://github.com/fastify/fast-content-type-parse/tree/next branch so you can target your work to it.