Add a CI builder for Windows

[zimmski]

I do not know of any free Windows CIs. So this is a very open question for me.

[maksimov]

Have you looked at https://www.appveyor.com/?

[zimmski]

No, but it looks promising. I am a little lost when it comes to Windows but IMHO go-diff must only compile and pass the tests on other OSs. I did a small search and these are maybe good resources to get started:

• https://blog.markvincze.com/setting-up-an-appveyor-pipeline-for-golang/
• https://github.com/joefitzgerald/go-plus/blob/master/appveyor.yml
• https://github.com/oschwald/maxminddb-golang/blob/master/appveyor.yml

[nathaniel-brough]

I have implemented a config file for appveyor, you will just need to open an account with appveyor and it should find the file and start a build. Currently builds and tests are working however, lint is not working as it relies on a *nix shell. See Pull request here

[zimmski]

EDIT: I have enough rights, appveyor.com is configured to accept CI tasks.