message: refactor(utxo-lib): simplify hashForZcashSignature
  Reduce indentation
  Issue:
diff: @@ -648,7 +648,11 @@ Transaction.prototype.hashForZcashSignature = function (inIndex, prevOutScript,
  throw new Error('Input index is out of range')
  }
  - if (this.isOverwinterCompatible()) {
  + /* istanbul ignore next */
  + if (!this.isOverwinterCompatible()) {
  + throw new Error(`unsupported version`);
  + }
  +
  var hashPrevouts = this.getPrevoutHash(hashType)
  var hashSequence = this.getSequenceHash(hashType)
  var hashOutputs = this.getOutputsHash(hashType, inIndex)
  @@ -705,10 +709,6 @@ Transaction.prototype.hashForZcashSignature = function (inIndex, prevOutScript,
  return this.getBlake2bHash(bufferWriter.buffer, personalization)
  }
  - /* istanbul ignore next */
  - throw new Error(`unsupported version`)
  -}
  -
  Transaction.prototype.hashForWitnessV0 = function (inIndex, prevOutScript, value, hashType) {
  typeforce(types.tuple(types.UInt32, types.Buffer, types.Satoshi, types.UInt32), arguments)
  