Added vulcanize under third_party/npm_modules

node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/set.js

Index: node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/set.js
diff --git a/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/set.js b/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/set.js
new file mode 100644
index 0000000000000000000000000000000000000000..5b992185bb81546d194ff236edb695f25faf5061
--- /dev/null
+++ b/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/set.js
@@ -0,0 +1,28 @@
+'use strict';
+
+
+var Type = require('../type');
+
+
+var _hasOwnProperty = Object.prototype.hasOwnProperty;
+
+
+function resolveYamlSet(state) {
+  var key, object = state.result;
+
+  for (key in object) {
+    if (_hasOwnProperty.call(object, key)) {
+      if (null !== object[key]) {
+        return false;
+      }
+    }
+  }
+
+  return true;
+}
+
+
+module.exports = new Type('tag:yaml.org,2002:set', {
+  loadKind: 'mapping',
+  loadResolver: resolveYamlSet
+});