The addon is essentially not outdated. The code works fine, the toc file number is outdated... toc numbers have no relevance to how an addon works.
Here is a F.A.Q for all of the slash commands that nUI supports.
"/nui minimap' slash command to toggle nUI management of the Blizzard minimap on and off (for compatability with addons like SimpleMinimap) -- note: using this command will force an user interface reload"