chore(deps): regenerate package-lock.json after @types/node bump (#60)

Fixes the lockfile drift left on `main` when #58 merged with only
`package.json` updated. `npm install` regenerates `package-lock.json`
cleanly; `@types/node` resolves to `20.19.41` (highest compatible with
the new `^20.19.40` range).

Follow-up to the cherry-pick recovery flagged in #58 — the Contents-API
write for the lockfile failed during the recovery, so the merge landed
in a drifted state until now.

Author: hyperpolymath