Outdated Node version support

[Jeff Prestes]

First of all, thanks for the project.

I was trying to install the dependencies with yarn I saw this error:

[1/5] 🔍  Validating package.json...
error zkp-app-boilerplate@0.1.0: The engine "node" is incompatible with this module. Expected version ">=16 <17". Got "18.13.0"
error Found incompatible module.

The actual Node LTS version is 18 ( https://nodejs.dev/en/about/releases/ )
Are you aware of any incompatibility with Node 18? Or we can update the package.json via PR ?
I am asking this before to send the PR because you may know something and I want to avoid unnecessary work.