db: fix level-js iterators.
db: fix level-js iterators.

decentraland/bronzeage-node,VidaID/bcoin,decentraland/decentraland-node,decentraland/decentraland-node,VidaID/bcoin,decentraland/bronzeage-node,VidaID/bcoin,decentraland/bronzeage-node,decentraland/decentraland-node