chore: add timeout mechanism for fetch calls (#3649)

packages/netlify-cms-core/src/integrations/providers/algolia/implementation.js

@@ -1,6 +1,9 @@
 import _ from 'lodash';
 import { createEntry } from 'ValueObjects/Entry';
 import { selectEntrySlug } from 'Reducers/collections';
+import { unsentRequest } from 'netlify-cms-lib-util';
+
+const { fetchWithTimeout: fetch } = unsentRequest;
 
 function getSlug(path) {
   return path

packages/netlify-cms-core/src/integrations/providers/assetStore/implementation.js

@@ -1,5 +1,8 @@
 import { pickBy, trimEnd } from 'lodash';
 import { addParams } from 'Lib/urlHelper';
+import { unsentRequest } from 'netlify-cms-lib-util';
+
+const { fetchWithTimeout: fetch } = unsentRequest;
 
 export default class AssetStore {
   constructor(config, getToken) {