Update .travis.yml: Bump node versions

jhermsmeier · jhermsmeier · commit cdbd95cc87d5 · 2016-12-11T18:25:33.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,11 +1,9 @@
 language: node_js
 sudo: false
 node_js:
-  - 0.10
-  - 0.11
-  - 0.12
-  - 4
   - stable
+  - 6
+  - 4
 branches:
   only:
     - master
