Remove dependency on urijs

It looks like there might be issues using sdk-factory inside a chrome extension.

Chrome throws the following error, and says URI.js is the offender:

Uncaught EvalError: Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive...

uri.js looks like they've dealt with this issue in the past https://github.com/medialize/URI.js/issues/105 and resolved it, but that was several years ago so I wonder if the issue arose again.

I think it would just be easier for us to remove our dependency on the package altogether.