feat: update browserstacktunnel dependency
feat: update browserstacktunnel dependency

It contains the latest BrowserStack.jar

On Travis, when the JAR is not the latest, it fetches the latest one, which then starts a sub process and so the stdout is not parsed and therefore the start callback never gets called.

jackspirou/karma-browserstack-launcher,karma-runner/karma-browserstack-launcher,luhmann/karma-browserstack-launcher,Dignifiedquire/karma-browserstack-launcher,mzgol/karma-browserstack-launcher,szarouski/karma-browserstack-launcher,shirish87/karma-browserstack-launcher