Update hbs requirement in package.json for test app

HBS >= 1.0.2 added support for express 3.0 templates. Anything less and you'll get some weird messages.
https://github.com/donpark/hbs/blob/v1.0.2/lib/hbs.js
vs https://github.com/donpark/hbs/blob/1.0.1/lib/hbs.js