Double check the homebrew commands.

Author: cthrax

.travis.yml

@@ -8,7 +8,7 @@ os:
   - osx
 script: npm run-script test
 before_install:
-  - if [[ $TRAVIS_OS_NAME == "osx" ]]; then brew update; brew install nvm; fi
+  - if [[ $TRAVIS_OS_NAME == "osx" ]]; then echo "updating nvm for osx"; brew update; brew install nvm; fi
   - nvm install $NODE_VERSION
   - npm config set spin false
 install: