specify iojs-v1.2.0

node-sass(2.0.1) does not support iojs > 1.2.0 ATM
see: sass/node-sass#693 (comment)

Author: kingcody

.travis.yml

@@ -2,7 +2,7 @@ language: node_js
 node_js:
 - '0.10'
 - '0.12'
-- 'iojs'
+- 'iojs-v1.2.0'
 script: npm run-script test-travis
 after_script:
 - npm install -g coveralls@2