message: use bitcoin.script.nulldata.output
diff: @@ -403,7 +403,7 @@ export function makeRevokeSkeleton(fullyQualifiedName: string) {
  opRet.write('id~', 0, 3, 'ascii')
  const opReturnBuffer = Buffer.concat([opRet, nameBuff])
  - const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  + const nullOutput = bitcoin.script.nullData.output.encode(opReturnBuffer)
  const tx = new bitcoin.TransactionBuilder(network.layer1)
  @@ -468,7 +468,7 @@ export function makeNamespacePreorderSkeleton(
  opReturnBuffer.write(paddedBurnHex, 39, 16, 'hex')
  }
  - const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  + const nullOutput = bitcoin.script.nullData.output.encode(opReturnBuffer)
  const tx = new bitcoin.TransactionBuilder(network.layer1)
  @@ -498,7 +498,7 @@ export function makeNamespaceRevealSkeleton(
  opReturnBuffer.write('id&', 0, 3, 'ascii')
  opReturnBuffer.write(hexPayload, 3, hexPayload.length / 2, 'hex')
  - const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  + const nullOutput = bitcoin.script.nullData.output.encode(opReturnBuffer)
  const tx = new bitcoin.TransactionBuilder(network.layer1)
  tx.addOutput(nullOutput, 0)
  @@ -523,7 +523,7 @@ export function makeNamespaceReadySkeleton(
  opReturnBuffer.write('id!', 0, 3, 'ascii')
  opReturnBuffer.write(`.${namespaceID}`, 3, namespaceID.length + 1, 'ascii')
  - const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  + const nullOutput = bitcoin.script.nullData.output.encode(opReturnBuffer)
  const tx = new bitcoin.TransactionBuilder(network.layer1)
  tx.addOutput(nullOutput, 0)
  @@ -553,7 +553,7 @@ export function makeNameImportSkeleton(name: string, recipientAddr: string, zone
  opReturnBuffer.write('id;', 0, 3, 'ascii')
  opReturnBuffer.write(name, 3, name.length, 'ascii')
  - const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  + const nullOutput = bitcoin.script.nullData.output.encode(opReturnBuffer)
  const tx = new bitcoin.TransactionBuilder(network.layer1)
  const zonefileHashB58 = bitcoin.address.toBase58Check(
  new Buffer(zonefileHash, 'hex'), network.layer1.pubKeyHash)
  @@ -583,7 +583,7 @@ export function makeAnnounceSkeleton(messageHash: string) {
  opReturnBuffer.write('id#', 0, 3, 'ascii')
  opReturnBuffer.write(messageHash, 3, messageHash.length, 'hex')
  - const nullOutput = bitcoin.script.nullDataOutput(opReturnBuffer)
  + const nullOutput = bitcoin.script.nullData.output.encode(opReturnBuffer)
  const tx = new bitcoin.TransactionBuilder(network.layer1)
  tx.addOutput(nullOutput, 0)
  