chore(karma): upgrade karma to 0.8.4
chore(karma): upgrade karma to 0.8.4

we needed this upgrade to disable animations in scenario runner
(karma ships with its own copy of angular-scenario.js which
got update in 0.8.4)

ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js,ggershoni/angular.js