Update Bowser to the latest version. Fixes #26

The embedded Bowser detection fails when greeted with a Safari navigator.userAgent value from WD TV Live, LG NetCast, Samsung SmartHub, etc.

This bug causes concatenated JS builds to fail to load due to this JS error.
Using non-concatenated plain JS `<script>` tags still raise the error yet it doesn't destroy the execution context.

Latest Bowser have this issue fixed.