Added node LTS versions to travis

rhodgkins · rhodgkins · commit 2d5130df9573 · 2018-04-04T14:56:17.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -2,4 +2,7 @@ language: node_js
 node_js:
   - '0.10'
   - '0.12'
+  - 4
+  - 6
+  - 8
   - 'stable'
