Fix node version

ragingwind · ragingwind · commit e01f51a6492f · 2016-07-16T21:24:13.000+09:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,5 +1,4 @@
 language: node_js
 node_js:
   - 'stable'
-  - '0.12'
-  - '0.10'
+  - '5'
