[Tests] drop support for pre-node-4, add node 6, properly quote node versions.

ljharb · ljharb · commit 3c8afb344415 · 2016-07-06T09:03:38.000-07:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,9 +1,7 @@
 language: node_js
 node_js:
-  - 0.10
-  - 0.12
-  - iojs
-  - 4
-  - 5
+  - '6'
+  - '5'
+  - '4'
 after_success:
   - npm run coveralls
