the test with persistant db level instead of level-mem does not pass

[scenaristeur]

level has been upgraded this way https://github.com/Level/level/blob/master/UPGRADING.md
and test with persistent level does not work

  db.search
    1) should find homies in Paris

  138 passing (288ms)
  1 failing

  1) db.search
       should find homies in Paris:
     Uncaught TypeError: leveldb.createValueStream is not a function
      at Object.getStream (node_modules/levelgraph/lib/levelgraph.js:59:28)
      at SortJoinStream._start (node_modules/levelgraph/lib/sortjoinstream.js:110:30)
      at new SortJoinStream (node_modules/levelgraph/lib/sortjoinstream.js:82:8)
      at SortJoinStream (node_modules/levelgraph/lib/sortjoinstream.js:57:12)
      at node_modules/levelgraph/lib/levelgraph.js:145:16
      at Array.map (<anonymous>)
      at node_modules/levelgraph/lib/levelgraph.js:139:30
      at node_modules/levelgraph/lib/queryplanner.js:93:7
      at NoResultsHolder.release (node_modules/fastparallel/parallel.js:139:9)
      at process.processTicksAndRejections (node:internal/process/task_queues:77:11)