Travis: don't test on Node v4.1

dchest · dchest · commit d4a89541d0f4 · 2015-09-17T22:11:56.000+02:00
There's a zero-filling bug with Uint8Arrays in 4.1, which breaks one test: nodejs/node#2930 (comment)
diff --git a/.travis.yml b/.travis.yml
@@ -2,7 +2,7 @@ sudo: false
 language: node_js
 node_js:
   - "0.10"
-  - "4.1"
+  - "4.0"
   - iojs
 env:
   - NACL_SRC=nacl.min.js
