code: function halt (err, options) {
    options = Object.assign({ exitCode: 1 }, options)
    if (err) {
      if (err.code === 'EPIPE') {
        process.exit(0) /* no big deal */
      } else {
        const t = require('typical')
        printError(t.isString(err) ? err : options.stack ? err.stack : err.message, options)
      }
    }
    process.exit(options.exitCode)
  }
docs: Stop the process with an error message.
  
  @param [err] {Error} - the error instance
  @param [options] {object}
  @param [options.exitCode] {number} - defaults to 1
  @param [options.stack] {boolean} - defaults to false
  @static