Update to browserify@~2.35 for dedupe fix

Update Browserify version to ~2.35 to take advantage of this fix that
was merged in today:

https://github.com/substack/node-browserify/pull/512

This fixes a bug with sourcemaps + alias.
Merge pull request #107 from spikebrehm/browserify-2.35

Update to browserify@~2.35 for dedupe fix