removed wdio-sync dependency from shrinkwrap
removed wdio-sync dependency from shrinkwrap

Pitzcarraldo/webdriverio,Pitzcarraldo/webdriverio,monolithed/webdriverio,Risto-Stevcev/webdriverio,monolithed/webdriverio,sebastiendavid/webdriverio,Risto-Stevcev/webdriverio,testingbot/webdriverjs,sebastiendavid/webdriverio,testingbot/webdriverjs