Upgrade vulcanize to 0.7.6.

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

Index: node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/omap.js
diff --git a/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/omap.js b/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/omap.js
index cbb21bda485e228f08ce727b994f99587e5078ac..f956459a0d6ae45410b1c10fb53da702c583f313 100644
--- a/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/omap.js
+++ b/node_modules/vulcanize/node_modules/update-notifier/node_modules/configstore/node_modules/js-yaml/lib/js-yaml/type/omap.js
@@ -1,16 +1,17 @@
 'use strict';
 
-
 var Type = require('../type');
 
-
 var _hasOwnProperty = Object.prototype.hasOwnProperty;
 var _toString       = Object.prototype.toString;
 
+function resolveYamlOmap(data) {
+  if (null === data) {
+    return true;
+  }
 
-function resolveYamlOmap(state) {
   var objectKeys = [], index, length, pair, pairKey, pairHasKey,
-      object = state.result;
+      object = data;
 
   for (index = 0, length = object.length; index < length; index += 1) {
     pair = object[index];
@@ -44,8 +45,12 @@ function resolveYamlOmap(state) {
   return true;
 }
 
+function constructYamlOmap(data) {
+  return null !== data ? data : [];
+}
 
 module.exports = new Type('tag:yaml.org,2002:omap', {
-  loadKind: 'sequence',
-  loadResolver: resolveYamlOmap
+  kind: 'sequence',
+  resolve: resolveYamlOmap,
+  construct: constructYamlOmap
 });