Upgrade to Node.js 24 and update @types/node to 24.12.0

[thyarles]

Upgrade GitHub Actions runtime from Node.js 20 to Node.js 24

Summary

Migrates the action runtime from node20 to node24 to address the upcoming deprecation of Node.js 20 on GitHub Actions runners. It fixes the issue #240.

Motivation

GitHub has announced the deprecation of Node.js 20 on GitHub Actions runners:

• June 2, 2026 — Node.js 24 becomes the default runtime for JavaScript actions
• September 16, 2026 — Node.js 20 will be removed from runners entirely, breaking any action still using node20

This PR proactively makes the migration before the forced cutover, avoiding unexpected failures in workflows that depend on this action.

Changes

File	Change
action.yml	using: node20 → using: node24
package.json	@types/node ^20 → ^24

Testing

All 26 existing tests pass without modification:

Test Suites: 3 passed, 3 total
Tests:       26 passed, 26 total

No logic was changed — this is a runtime and type definition update only.

References

• GitHub Changelog: Deprecation of Node.js 20 on GitHub Actions runners

[oshanz]

fixes #240