build(travis): update .travis.yml to test on node 4 and 5

JohnCashmore · IgorMinar · commit d380cd5b6196 · 2015-11-22T07:34:11.000-08:00
Closes #56
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,7 @@
 sudo: false
 env:
-  - NODE_VERSION=0.10
-  - NODE_VERSION=0.12
-  - NODE_VERSION=iojs
+  - NODE_VERSION=4
+  - NODE_VERSION=5
 
 os:
   - linux
