support current node versions only

hacksparrow · hacksparrow · commit 8248a5c312e4 · 2016-05-24T02:11:50.000+05:30
diff --git a/.travis.yml b/.travis.yml
@@ -1,8 +1,5 @@
 language: node_js
 node_js:
-  - "1.8"
-  - "2.5"
-  - "3.3"
-  - "4.4"
-  - "5.11"
-  - "6.2"
+  - "4.4.4"
+  - "5.11.1"
+  - "6.2.0"
