nodenv version-name doesn't recognize this plugin

[rmm5t]

package.json has engines.node specified:

$ cat package.json 
{
  "engines": {
    "node": "6.10.3",
    // ...

node -v then behaves as expected:

$ node -v
v6.10.3

However, node version (and node version-name) do not behave as expected (they are returning my globally set version):

$ nodenv version
8.9.4 (set by /Users/i2190/.nodenv/version)

$ nodenv version-name
8.9.4

[rmm5t]

I should also add some context as to why I care about this discrepancy. I keep my current node version in my bash prompt at all times, and the prompt relies on nodenv version-name.

[hurrymaplelad]

Thanks for the heads up! PR with fix is up.