I've read a couple issues on Windows support, and I'm not sure what the current support state is. Anyway, the `WriteFile` function is broken on Windows, as `*os.File.Chmod()` used in the function is not supported on Windows: https://github.com/google/renameio/blob/a368f9987532a68a3d676566141654a81aa8100b/writefile.go#L29