code: function printHelp(argv) {
      if (argv.help || argv.h) {
          showHelpInfo();
          process.exit(0);
      }
  
      // soi --version
      if (argv.version || argv.v) {
          console.log(`soi version: ${pkgInfo.version}`);
          process.exit(0);
      }
  }
docs: Parse command line arguments.
  @param {object} argv e.g. ｀soi --file soi.conf.js｀
  will result in:
  {
  _: [],
  file: "soi.conf.js"
  }