fix unrelated travis build failure

Mrmaxmeier · Mrmaxmeier · commit c53c85e3dd51 · 2016-12-11T21:38:44.000+01:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,7 @@
 sudo: false
-
+language: node_js
+node_js:
+  - stable
 os:
   - osx
   - linux
