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

added test notes & updated contributing guidelines (+1 squashed commit)
Squashed commits:
[33b059b] bump dep, reworked yandex cookie, enabled GA real-time tracking

fix pr per comments, working cookie w/ more content (+1 squashed commit)
Squashed commits:
[8114703] bump dep, reworked yandex cookie, enabled GA real-time tracking