Update .travis.yml

pkra · pkra · commit edba9c59e0fb · 2015-10-28T17:59:06.000+01:00
iojs is no longer supported.
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-- 'iojs'
+- '4.1'
 sudo: false
 script:
   - npm install
