Pass token through npm.

Author: octalmage

.travis.yml

@@ -50,8 +50,7 @@ script:
   - npm test
 
 after_success:
-  - if [ $TRAVIS_BRANCH == "master" ]; then echo upload=$GITHUB_TOKEN > ~/.prebuildrc; fi
-  - if [ $TRAVIS_BRANCH == "master" ]; then npm run prebuild; fi
+  - if [ $TRAVIS_BRANCH == "master" ]; then npm run prebuild -- -u $GITHUB_TOKEN; fi
 
 notifications:
   webhooks: