setgid on test directory - make travis fail as per #103

Author: phated

.travis.yml

@@ -1,9 +1,12 @@
 sudo: false
 language: node_js
 node_js:
+  - 'stable'
   - '4.1'
   - '4.0'
   - '0.12'
   - '0.10'
+before_script:
+  - find test -type d -exec chmod g+s {} \;
 after_script:
   - npm run coveralls