Switch to golang.org/x/sys/windows

[twpayne]

Describe the new feature or change suggestion

Firstly, thank you for this project!

Currently go.bug.st/serial has its own generated Windows syscalls in syscall_windows.go and zsyscall_windows.go. I recently opened a PR for golang.org/x/sys that adds the necessary calls: https://go-review.googlesource.com/c/sys/+/572295.

Once this is merged and released then go.bug.st/serial can switch to a more recent version of golang.org/x/sys and remove its generated code. I'm happy to open a PR to do this when the time comes.

Additional context

#149 makes a similar change. Can #149 be merged too?

Issue checklist

• I searched for previous requests in the issue tracker
• My request contains all necessary details

[twpayne]

Closing due to inactivity.