Display currently in use version of Node.js

[nothingrandom]

Feature request

Similar to the virtualenv feature, it'd be great if this was extended into node, and showed the current version being used via nvm or similar tools

[sindresorhus]

Would definitely be useful. The problem is that there are many different Node.js version managers. Do we support them all? That's a slippery slope. nvm is definitely the most popular ones, but IMHO far from the best one.

Also see #460, which would let you implement this yourself.

[alexlafroscia]

I forked pure for a time and supported this by just doing an async node --version in the current directory, much like the git checks, to account for tools that change version based on a config file. Just asking the node executable for the version means not having to worry about the version manager (although it is definitely slower ☹️ )