code: function registerHelpListener (controller, helpInfo) {
    controller.hears('^help ' + helpInfo.command + '$', 'direct_mention,direct_message', (bot, message) => {
      let replyText = helpInfo.text
  
      if (typeof helpInfo.text === 'function') {
        let helpOpts = _.merge({botName: bot.identity.name}, _.pick(message, ['team', 'channel', 'user']))
  
        replyText = helpInfo.text(helpOpts)
      }
  
      bot.reply(message, replyText)
    })
  }
docs: Adds a single help listener for a plugin
  
  @param controller
  @param helpInfo