(#6353) - clean up badges in README (#6354)
(#6353) - clean up badges in README (#6354)

[skip ci]
cdaringe/pouchdb,cdaringe/pouchdb,tyler-johnson/pouchdb,pouchdb/pouchdb,seigel/pouchdb,seigel/pouchdb,tyler-johnson/pouchdb,pouchdb/pouchdb,pouchdb/pouchdb,seigel/pouchdb,tyler-johnson/pouchdb,cdaringe/pouchdb