message: add debug to readme
diff: @@ -66,6 +66,7 @@ This section will list out all the available methods and functionality in the li
  .channelCreate(channel)
  .channelUpdate(channel, cachedChannel)
  .channelDelete(channel)
  +.debug(details)
  .guildBanAdd(guild, memberOrUserData)
  .guildBanRemove(guild, memberOrUserData)
  .guildCreate(guild)
  