(#5051) - chore(package): update webpack to version 1.12.15
(#5051) - chore(package): update webpack to version 1.12.15

http://greenkeeper.io/
colinskow/pouchdb,daleharvey/pouchdb,willholley/pouchdb,tyler-johnson/pouchdb,seigel/pouchdb,willholley/pouchdb,colinskow/pouchdb,yaronyg/pouchdb,pouchdb/pouchdb,cdaringe/pouchdb,pouchdb/pouchdb,yaronyg/pouchdb,willholley/pouchdb,garrensmith/pouchdb,jhs/pouchdb,tyler-johnson/pouchdb,jhs/pouchdb,pouchdb/pouchdb,colinskow/pouchdb,garrensmith/pouchdb,mikeymckay/pouchdb,mikeymckay/pouchdb,seigel/pouchdb,jhs/pouchdb,tyler-johnson/pouchdb,garrensmith/pouchdb,mikeymckay/pouchdb,shimaore/pouchdb,TechnicalPursuit/pouchdb,TechnicalPursuit/pouchdb,cdaringe/pouchdb,yaronyg/pouchdb,shimaore/pouchdb,seigel/pouchdb,TechnicalPursuit/pouchdb,shimaore/pouchdb,cdaringe/pouchdb,daleharvey/pouchdb,daleharvey/pouchdb