feat: throw error if node version out-dated

[jatZama]

This might be useful to avoid many silently failing tests if Node version is less than 20. Wdyt?

[immortal-tofu]

Not a big fan of preinstall script for this usage, it could create new issue for some projects. I think it's ok to just use "engines". Developer can use tools to verify engines for their package if they want to.

[jatZama]

ok, should i remove this hook from fhevm and hardhat-template as well then?

[immortal-tofu]

Yes, especially for fhevm because fhevm is a Solidity library and we don't care if people are using node 18 in this case. AFAIK, preinstall is used in both situations: when you do npm install locally in the repository and when you do npm install fhevm.