fix: preserve existing package.json dependency versions as minimums

[JoshuaKGoldberg]

PR Checklist

• Addresses an existing open issue: fixes 🐛 Bug: Transition mode should not lower package.json dependency versions #1997
• That issue was marked as status: accepting prs
• Steps in CONTRIBUTING.md were taken

Overview

Uses the semver package to avoid using new dependency versions if they're smaller than existing ones.

As a nice-to-have, not-strictly-necessary cleanup, removes the Base distinction between "full" package data and what's used in Blocks. It's just packageData now. No more packageDataFull.

🎁

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.92%. Comparing base (841dacc) to head (03b4297).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1999   +/-   ##
=======================================
  Coverage   99.92%   99.92%           
=======================================
  Files         106      105    -1     
  Lines        4183     4191    +8     
  Branches      253      261    +8     
=======================================
+ Hits         4180     4188    +8     
  Misses          3        3           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[github-actions]

🎉 This is included in version v2.7.3 🎉

The release is available on:

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

Cheers! 📦🚀