(#4718) - test cleanup: callbacks to promises
(#4718) - test cleanup: callbacks to promises

lukevanhorn/pouchdb,colinskow/pouchdb,TechnicalPursuit/pouchdb,pouchdb/pouchdb,bbenezech/pouchdb,cdaringe/pouchdb,tyler-johnson/pouchdb,daleharvey/pouchdb,mikeymckay/pouchdb,lukevanhorn/pouchdb,jhs/pouchdb,daleharvey/pouchdb,bbenezech/pouchdb,nickcolley/pouchdb,pouchdb/pouchdb,willholley/pouchdb,jhs/pouchdb,colinskow/pouchdb,shimaore/pouchdb,yaronyg/pouchdb,mikeymckay/pouchdb,pouchdb/pouchdb,shimaore/pouchdb,garrensmith/pouchdb,cdaringe/pouchdb,seigel/pouchdb,bbenezech/pouchdb,seigel/pouchdb,garrensmith/pouchdb,tyler-johnson/pouchdb,TechnicalPursuit/pouchdb,tyler-johnson/pouchdb,nickcolley/pouchdb,lukevanhorn/pouchdb,nickcolley/pouchdb,TechnicalPursuit/pouchdb,yaronyg/pouchdb,yaronyg/pouchdb,jhs/pouchdb,cdaringe/pouchdb,mikeymckay/pouchdb,shimaore/pouchdb,garrensmith/pouchdb,daleharvey/pouchdb,colinskow/pouchdb,willholley/pouchdb,willholley/pouchdb,seigel/pouchdb