chore(package): update webpack to version 1.12.13
chore(package): update webpack to version 1.12.13

http://greenkeeper.io/
PJL101/foley,PJL101/foley,fephil/garrus,fephil/foley,kimadactyl/dearfriend-v2,fephil/foley,fephil/garrus,kimadactyl/dearfriend-v2,kimadactyl/dearfriend-v2