Update supported Node Versions

mtscout6 · mtscout6 · commit 03914f2e1486 · 2017-07-16T17:02:58.000-06:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,8 @@
 sudo: false
 language: node_js
 node_js:
+  - '8'
   - '6'
-  - '5'
-  - '4'
 
 cache:
   directories:
