Upgrade `serialport` dependency to version 13

[mkrenzke]

Hi maintainers :wave:,

I'm suggesting an upgrade to the serialport package dependency in this project. The current version used is outdated, and upgrading to serialport@13 would bring several benefits:

Benefits of upgrading:

• Improved compatibility with newer versions of Node.js.
• Bug fixes and performance improvements included in recent serialport releases.

Proposed change:

Update the package.json to:

"serialport": "^13.0.0"

Additional context:

I understand that upgrading may require some validation to ensure backward compatibility. If needed, I’d be happy to assist in testing or providing a PR.

Let me know if this is something that would be helpful for the project!

Thanks for maintaining node-modbus-serial — it's a great library!

Best regards, Manuel