bump dep, reworked yandex cookie, enabled GA real-time tracking

Fixes #25 & #19's comments regarding real time tracking. Tested & works on live GA deployment.
2 reasons:
- Per comments in https://github.com/yeoman/insight/issues/19, this prevents real-time tracking from working. I tested this on a live account and it is true
- `an` & `av` isn't being recorded anyway for web tracking, so pointless to send it. Once we refactor to app tracking, I'll put it back in.