lib/classes/PluginManager.js/PluginManager/assignDefaultOptions
class PluginManager:  assignDefaultOptions(command) {
    _.forEach(command.options, (value, key) => {
      if (value.default && (!this.cliOptions[key] || this.cliOptions[key] === true)) {
        this.cliOptions[key] = value.default;
      }
    });
  }