(#5140) - remove use of buffer.toArrayBuffer()
(#5140) - remove use of buffer.toArrayBuffer()

buffer dropped support for toArrayBuffer
(see https://github.com/feross/buffer/issues/90). However, all the
browsers we support have typed array support so the storedObject will
be implemented as a typed array from which we can directly construct
a Blob.
willholley/pouchdb,yaronyg/pouchdb,cdaringe/pouchdb,TechnicalPursuit/pouchdb,jhs/pouchdb,mikeymckay/pouchdb,daleharvey/pouchdb,shimaore/pouchdb,garrensmith/pouchdb,pouchdb/pouchdb,pouchdb/pouchdb,willholley/pouchdb,garrensmith/pouchdb,TechnicalPursuit/pouchdb,tyler-johnson/pouchdb,tyler-johnson/pouchdb,colinskow/pouchdb,seigel/pouchdb,yaronyg/pouchdb,jhs/pouchdb,daleharvey/pouchdb,colinskow/pouchdb,seigel/pouchdb,yaronyg/pouchdb,daleharvey/pouchdb,garrensmith/pouchdb,TechnicalPursuit/pouchdb,willholley/pouchdb,mikeymckay/pouchdb,cdaringe/pouchdb,jhs/pouchdb,mikeymckay/pouchdb,seigel/pouchdb,pouchdb/pouchdb,tyler-johnson/pouchdb,cdaringe/pouchdb,shimaore/pouchdb,shimaore/pouchdb,colinskow/pouchdb