fix: merkle root hash verification failed on devnet

[shumkov]

Issue being fixed or feature implemented

DAPI Client failed to sync masternode list on devnet:

warn: [DAPIClient: noid] Can't apply masternode list diff: Merkle root from the diff doesn't match calculated merkle root after diff is applied {
  diffCount: 1,
  network: 'devnet',
  blockHash: '00000063c9614167fac7439247a8177343e4f35e755abda503a717c2d680a610',
  error: Error: Merkle root from the diff doesn't match calculated merkle root after diff is applied
      at SimplifiedMNList.applyDiff (/Users/ivanshumkov/Projects/dashpay/platform/.yarn/cache/@dashevo-dashcore-lib-npm-0.21.1-2fe9b7647d-68502e4078.zip/node_modules/@dashevo/dashcore-lib/lib/deterministicmnlist/SimplifiedMNList.js:86:11)
      at new SimplifiedMNList (/Users/ivanshumkov/Projects/dashpay/platform/.yarn/cache/@dashevo-dashcore-lib-npm-0.21.1-2fe9b7647d-68502e4078.zip/node_modules/@dashevo/dashcore-lib/lib/deterministicmnlist/SimplifiedMNList.js:42:10)
      at ReconnectableStream.dataHandler (/Users/ivanshumkov/Projects/dashpay/platform/packages/js-dapi-client/lib/SimplifiedMasternodeListProvider/SimplifiedMasternodeListProvider.js:137:37)
      at ReconnectableStream.emit (node:events:518:28)
      at ReconnectableStream.dataHandler (/Users/ivanshumkov/Projects/dashpay/platform/packages/js-dapi-client/lib/transport/ReconnectableStream.js:190:10)
      at ClientReadableStreamImpl.emit (node:events:518:28)
      at addChunk (node:internal/streams/readable:559:12)
      at readableAddChunkPushObjectMode (node:internal/streams/readable:536:3)
      at Readable.push (node:internal/streams/readable:391:5)
      at Object.onReceiveMessage (/Users/ivanshumkov/Projects/dashpay/platform/.yarn/cache/@grpc-grpc-js-npm-1.4.4-f333f82239-9d9c1aad22.zip/node_modules/@grpc/grpc-js/build/src/client.js:322:24)

What was done?

• Fixed deserialisatio of mn entry in dashcore lib

How Has This Been Tested?

Running test suite against devnet

Breaking Changes

None

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone