Consider changing serial library to improve multiplatform support

[chrisdalke]

Hi! Thanks for your work on gomavlib. I'm working on using the library to add a mavlink input plugin to telegraf (influxdata/telegraf#16221). Telegraf is a popular metrics ingestion / transformation tool written in go. Ingesting mavlink in telegraf would be a very useful feature for drone companion computers.

Telegraf has fairly extensive platform compatibility requirements: i386 linux, darwin (arm/amd64), armhf, etc.

It looks like gomavlib is mostly platform independent, with the exception of the serial library. Would you consider changing from the current serial library to something like https://github.com/bugst/go-serial?

If you're open to this, I can help put up a PR to make the switch and test the change.

Thanks!