chore(dependencies): use karma-runner 0.11.x

Due to https://github.com/karma-runner/karma/issues/57
moving to karma-runner 11 is a prerequisite before
switching to SauceLabs testing

Before Karma 0.11.x Karma was waiting for all the browsers to connect while Sauce limits number of concurrent browsers to 3 (in the free, OS plan).

Opening a PR so everyone is aware about this change.