Problem with cross compilation for Windows

Hello.
I'm trying to compile code for windows from MacOS and Linux and I've got an error:

`app.Enable undefined (type *autostart.App has no field or method Enable)`

My code:

```
     if runtime.GOOS == "windows" {
		exe, _ := os.Executable()
		app := &autostart.App{
			Name:        "test",
			DisplayName: "test",
			Exec:        []string{exe},
		}
		app.Enable()
	}
```
