Add prettier-plugin-packagejson

[mrmckeb]

This was a recommendation from @vvo:
https://github.com/matzkoh/prettier-plugin-packagejson

At the time there wasn't a clear way to ship this as a part of the shared config, but it looks like that's now possible:

See: https://prettier.io/docs/en/plugins.html#using-plugins

[vercel-release-bot]

🎉 This issue has been resolved in version 4.0.0-canary.1 🎉

The release is available on:

• npm package (@canary dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[vercel-release-bot]

🎉 This issue has been resolved in version 4.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀