1. Module bundling added to reduce server calls as each file was taking ~440 ms to load on public server.\n2. JavaScript lib files refactored with OOP for use with module bundling.

node_modules/jest-worker/build/WorkerPool.d.ts

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+import BaseWorkerPool from './base/BaseWorkerPool';
+import type { ChildMessage, OnCustomMessage, OnEnd, OnStart, WorkerInterface, WorkerOptions, WorkerPoolInterface } from './types';
+declare class WorkerPool extends BaseWorkerPool implements WorkerPoolInterface {
+    send(workerId: number, request: ChildMessage, onStart: OnStart, onEnd: OnEnd, onCustomMessage: OnCustomMessage): void;
+    createWorker(workerOptions: WorkerOptions): WorkerInterface;
+}
+export default WorkerPool;