Asynchronous function queue with adjustable concurrency.
此脚本不应被直接安装，它是一个供其他脚本使用的外部库。如果您需要使用该库，请在脚本元属性加入：// @require https://update.greasyfork.org/scripts/482311/1297431/queue.js
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Asynchronous function queue with adjustable concurrency.
This module exports a class Queue that implements most of the Array API. Pass async functions (ones that accept a callback or return a promise) to an instance's additive array methods. Processing begins when you call q.start().