ci(packages.json): changed node version to version >=8

#870

Author: benhalverson

.github/ISSUE_TEMPLATE.md

@@ -1,6 +1,6 @@
 <!-- before posting an issue, try chatting on https://gitter.im/pattern-lab/node -->
 
-<!-- before posting an issue, verify you are running at least Node 6 -->
+<!-- before posting an issue, verify you are running at least Node 8 -->
 
 I am using Pattern Lab Node `vX.X.X` on `Windows | Mac | Linux`, with Node `vX.X.X`, using a `Gulp | Grunt | Vanilla | Custom` Edition.
 

packages/cli/.nvmrc

@@ -0,0 +1 @@
+8.9.4

packages/cli/.travis.yml

@@ -1,7 +1,7 @@
 language: node_js
 node_js:
   - node
-  - 6
+  - 8
 before_script:
   - npm install edition-node
   - npm install starterkit-mustache-base

packages/cli/package.json

@@ -49,7 +49,7 @@
   "bugs": "https://github.com/pattern-lab/patternlab-node/issues",
   "license": "MIT",
   "engines": {
-    "node": ">=6.0"
+    "node": ">=8.0"
   },
   "publishConfig": {
     "access": "public"