package.json: upgrade to leveldb-1.19.
package.json: upgrade to leveldb-1.19.

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