chore(package): update uglify-js to version 2.7.5
chore(package): update uglify-js to version 2.7.5

https://greenkeeper.io/
vokal/keystone,alobodig/keystone,Pop-Code/keystone,danielmahon/keystone,brianjd/keystone,frontyard/keystone,danielmahon/keystone,frontyard/keystone,naustudio/keystone,naustudio/keystone,andrewlinfoot/keystone,danielmahon/keystone,trentmillar/keystone,ONode/keystone,dryna/keystone-twoje-urodziny,alobodig/keystone,Pop-Code/keystone,vokal/keystone,trentmillar/keystone,w01fgang/keystone,matthewstyers/keystone,andrewlinfoot/keystone,matthewstyers/keystone,benkroeger/keystone,ratecity/keystone,dryna/keystone-twoje-urodziny,rafmsou/keystone,ratecity/keystone,naustudio/keystone,matthewstyers/keystone,brianjd/keystone,vokal/keystone,rafmsou/keystone,linhanyang/keystone,benkroeger/keystone,concoursbyappointment/keystoneRedux,w01fgang/keystone,frontyard/keystone,concoursbyappointment/keystoneRedux,ONode/keystone,andrewlinfoot/keystone,trentmillar/keystone,benkroeger/keystone