|- build
|    |- browser (+ options)
|    |- cordova (+ options)
|    |- no subcommands, just options
|- config
|    |- create (+ options)

program.command('browser').description(...);
program.command('cordova').description(...);
program.option(...);

program.command('create').description(...);

const commander = require('commander');
const program = new commander.Command();
program
  .command('build', 'build description')
  .command('config', 'config description')
  .parse(process.argv);

const commander = require('commander');
const program = new commander.Command();
program
  .command('create')
  .description('create description')
  .action(() => {
    console.log('Called create');
  });
program.parse(process.argv);

$ node pm.js config create
Called create