fix travisCI node version

Igor Canedo · Igor Canedo · commit 4c86e5e3eece · 2018-05-17T14:31:47.000-03:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-  - "node"
+  - "lts/*"
   - "8"
 before_script:
   - "cd sample && npm install && npm run sync-lib && cd ../"
