message: fix: Windows commands
diff: @@ -170,7 +170,8 @@ pub fn run_npm_install(dir: PathBuf) -> Result<(), failure::Error> {
  return Ok(());
  }
  - let mut command = Command::new("npm");
  + let npm = which::which("npm").unwrap();
  + let mut command = Command::new(npm);
  command.current_dir(dir.clone());
  command.arg("install");
  info!("Running {:?} in directory {:?}", command, dir);
  