this.cwd is undefined in spawn-command

[yanni4night]

spawnCommand.spawnCommand = (command, args, opt) => {
    console.log(this.cwd);// undefined
  return spawn(command, args, {stdio: 'inherit', cwd: this.cwd, ...opt});
};

spawnCommand and spawnCommandSync should not be defined in arrow-function style.

[mshima]

Indeed, thanks for the report.