Update README.md

Co-Authored-By: pzagor2 <[email protected]>

Author: vpulim

README.md

@@ -21,7 +21,7 @@ const Blockchain = require('ethereumjs-blockchain')
 const utils = require('ethereumjs-util')
 
 const gethDbPath = './chaindata' // Add your own path here
-const db = levelup(leveldown(gethDbPath))
+const db = level(gethDbPath)
 
 new Blockchain({db: db}).iterator('i', (block, reorg, cb) => {
   const blockNumber = utils.bufferToInt(block.header.number)