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/null.js

Index: node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/null.js
diff --git a/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/null.js b/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/null.js
new file mode 100644
index 0000000000000000000000000000000000000000..3ea02df27685ae566af792130b58747309d18627
--- /dev/null
+++ b/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/null.js
@@ -0,0 +1,40 @@
+'use strict';
+
+
+var Type = require('../type');
+
+
+var YAML_NULL_MAP = {
+  '~'    : true,
+  'null' : true,
+  'Null' : true,
+  'NULL' : true
+};
+
+
+function resolveYamlNull(state) {
+  if (YAML_NULL_MAP.hasOwnProperty(state.result)) {
+    state.result = null;
+    return true;
+  }
+  return false;
+}
+
+
+function isNull(object) {
+  return null === object;
+}
+
+
+module.exports = new Type('tag:yaml.org,2002:null', {
+  loadKind: 'scalar',
+  loadResolver: resolveYamlNull,
+  dumpPredicate: isNull,
+  dumpRepresenter: {
+    canonical: function () { return '~';    },
+    lowercase: function () { return 'null'; },
+    uppercase: function () { return 'NULL'; },
+    camelcase: function () { return 'Null'; }
+  },
+  dumpDefaultStyle: 'lowercase'
+});