chore: upgrade dependencies

[kevinpainchaud]

• Upgrade Node from v16 to v20
• Upgrade actions/checkout and actions/setup-node from v3 to v4

[nwtgck]

Thanks! I'll merge dependabot PRs for dependency updates.

[nwtgck]

I'd like to separate a commit for the engine update to Node.js 20. The engine update may include:

• actions/setup-node (node-version)
• Type definition @types/node
• using in action.yaml

Thanks for the PR but I'll do the update.

[nwtgck]

nwtgck/actions-netlify@v3.0 using node20 released now.

[kevinpainchaud]

Thanks! 🙏