Add whatwg-fetch for tests

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "grapesjs",
-  "version": "0.16.47",
+  "version": "0.16.31",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -18275,6 +18275,12 @@
         "iconv-lite": "0.4.24"
       }
     },
+    "whatwg-fetch": {
+      "version": "3.5.0",
+      "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.5.0.tgz",
+      "integrity": "sha512-jXkLtsR42xhXg7akoDKvKWE40eJeI+2KZqcp2h3NsOrRnDvtWX36KcKl30dy+hxECivdk2BVUHVNrPtoMBUx6A==",
+      "dev": true
+    },
     "whatwg-mimetype": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",

package.json

@@ -39,7 +39,8 @@
     "sass": "^1.29.0",
     "sinon": "^7.5.0",
     "string-replace-loader": "^2.2.0",
-    "vuepress": "^1.7.1"
+    "vuepress": "^1.7.1",
+    "whatwg-fetch": "^3.5.0"
   },
   "keywords": [
     "grapes",

test/setup.js

@@ -1,3 +1,4 @@
+import 'whatwg-fetch';
 import _ from 'underscore';
 import Backbone from 'backbone';
 import sinon from 'sinon';

test/specs/storage_manager/model/Models.js

@@ -1,4 +1,3 @@
-// import 'whatwg-fetch';
 import LocalStorage from 'storage_manager/model/LocalStorage';
 import RemoteStorage from 'storage_manager/model/RemoteStorage';