feat(package): Communicate official node support

Adding shield with Node 6+ support. Changing nvmrc to what maintainers currently run

Author: bmuenzenmeyer

.github/ISSUE_TEMPLATE.md

@@ -1,12 +1,11 @@
 <!-- before posting an issue, try chatting on https://gitter.im/pattern-lab/node -->
-<!-- before posting an issue, verify you are running at least Node 4 or 5 -->
 
-I am using Pattern Lab Node `vX.X.X` on `Windows | Mac | Linux`, with Node `vX.X.X`, using the `Gulp | Grunt ` Edition.
+<!-- before posting an issue, verify you are running at least Node 6 -->
 
-##### Expected Behavior
+I am using Pattern Lab Node `vX.X.X` on `Windows | Mac | Linux`, with Node `vX.X.X`, using the `Gulp | Grunt` Edition.
 
+##### Expected Behavior
 
 ##### Actual Behavior
 
-
 ##### Steps to Reproduce

.nvmrc

@@ -1 +1 @@
-6.11.3
+8.9.4

README.md

@@ -1,6 +1,7 @@
 ![Pattern Lab Logo](/patternlab.png 'Pattern Lab Logo')
 
 [![Build Status](https://travis-ci.org/pattern-lab/patternlab-node.svg?branch=master)](https://travis-ci.org/pattern-lab/patternlab-node) ![current release](https://img.shields.io/npm/v/@pattern-lab/patternlab-node.svg) ![license](https://img.shields.io/github/license/pattern-lab/patternlab-node.svg) [![Coverage Status](https://coveralls.io/repos/github/pattern-lab/patternlab-node/badge.svg?branch=master)](https://coveralls.io/github/pattern-lab/patternlab-node?branch=master) [![code style: prettier](https://img.shields.io/badge/code_style-prettier-ff69b4.svg)](https://github.com/prettier/prettier)
+[![node (scoped)](https://img.shields.io/node/v/@pattern-lab/patternlab-node.svg)]()
 [![Join the chat at Gitter](https://badges.gitter.im/pattern-lab/node.svg)](https://gitter.im/pattern-lab/node)
 
 # Pattern Lab Node Core