🐛 Bug: Transition mode should not lower package.json dependency versions

[JoshuaKGoldberg]

Bug Report Checklist

• I have tried restarting my IDE and the issue persists.
• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Expected

Many repos set up with CTA have Renovate automatically bumping npm dependencies to their latest versions. If:

1. An npm dependency is bumped in a repo
2. npx create-typescript-app run in that repo resolves to a CTA with an older version of that dependency

...then the repo will get downgraded back down to the older version.

Actual

The package.json Block should check if there's an existing version for deps, and use the greater of (it, CTA's). That way transition mode won't lower versions in package.jsons.

Additional Info

Sibling issue for GHA deps: #1998

🎁

[github-actions]

🎉 This is included in version v2.7.3 🎉

The release is available on:

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

Cheers! 📦🚀