nvmrc incompatible with nodenv, asdf

[jas14]

As of d279f80e73ead42f53933b95a9402a5e6e265085 , .nvmrc is compatible with nvm but incompatible with nodenv (the latter does not support the lts/* specification).

However, the bin/setup script purports to support asdf, nvm, and nodenv.

Options:

• Update .nvmrc to the specific LTS version desired
• Specifically require nvm / prohibit nodenv