Update method doc

lib/server.js

@@ -1878,6 +1878,7 @@ WalletService.prototype._validateAndSanitizeTxOpts = function(wallet, opts, cb)
  * @param {string} opts.dryRun[=false] - Optional. Simulate the action but do not change server state.
  * @param {Array} opts.inputs - Optional. Inputs for this TX
  * @param {number} opts.fee - Optional. Use an fixed fee for this TX (only when opts.inputs is specified)
+ * @param {Boolean} opts.noShuffleOutputs - Optional. If set, TX outputs won't be shuffled. Defaults to false
  * @returns {TxProposal} Transaction proposal.
  */
 WalletService.prototype.createTx = function(opts, cb) {