message: fix(utxo-lib): write `version` as `Int32`
  It gets parsed as Int32 so we should write it as Int32 as well.
  See also
  Issue:
diff: @@ -724,7 +724,7 @@ Transaction.prototype.hashForWitnessV0 = function (inIndex, prevOutScript, value
  var bufferWriter = new BufferWriter(Buffer.allocUnsafe(156 + varSliceSize(prevOutScript)))
  var input = this.ins[inIndex]
  - bufferWriter.writeUInt32(this.version)
  + bufferWriter.writeInt32(this.version)
  bufferWriter.writeSlice(hashPrevouts)
  bufferWriter.writeSlice(hashSequence)
  bufferWriter.writeSlice(input.hash)
  