Wrongs stats are displayed when calculating size diff for replacing/removing dependenciew, but without touching any dependencies

[Kocal]

Hi!

First, let me thank you for this tool, it has been super useful on Symfony Webpack Encore and Symfony UX to reduce their JS dependencies, reduce disk size, etc... Thanks! 🫶

---

I'm running the package-size-calculator as it latest master version (git pull && go build), and I'm facing wrong statistics.

Steps to reproduce:

1. Run ./package-size-calculator
2. Chose Calculate size differences for replacing/removing dependencies
3. Fill package @symfony/webpack-encore
4. Do not add or remove dependencies, just press Done directly

And by doing that, I'm seeing 129 subdependencies removed even if no dependencies were added or removed (full logs):

Package size report
===================

Package info for "@symfony/webpack-encore@5.1.0": 47 MB
  Released: 2025-02-20 10:03:26.519 +0000 UTC (23w2d ago)
  Downloads last week: 48,953 (27.89%)
  Estimated traffic last week: 2.3 TB
  Subdependencies: 378

Estimated new statistics:
  Package size: 47 MB → 41 MB (87.46%)
  Subdependencies: 378 → 249 (-129)
  Traffic with last week's downloads:
    For current version: 2.3 TB → 2.0 TB (289 GB saved)
    For all versions: 8.3 TB → 7.2 TB (1.0 TB saved)

Do you know what can cause this issue? In Webpack Encore we use devDependencies and peerDependencies a lot, could it be related?

Thanks!