install gulp to process code

node_modules/bach/lib/settleParallel.js

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+'use strict';
+
+var asyncSettle = require('async-settle');
+var nowAndLater = require('now-and-later');
+
+var helpers = require('./helpers');
+
+function iterator(fn, key, cb) {
+  return asyncSettle(fn, cb);
+}
+
+function buildSettleParallel() {
+  var args = helpers.verifyArguments(arguments);
+
+  var options = helpers.getOptions(args);
+
+  if (options) {
+    args = args.slice(0, -1);
+  }
+
+  function settleParallel(done) {
+    var onSettled = helpers.onSettled(done);
+    nowAndLater.map(args, iterator, options, onSettled);
+  }
+
+  return settleParallel;
+}
+
+module.exports = buildSettleParallel;