increased the number of parallel downloads

lib/single-file/single-file-core.js

@@ -163,7 +163,7 @@ this.SingleFileCore = this.SingleFileCore || (() => {
 	class BatchRequest {
 		constructor() {
 			this.requests = new Map();
-			this.MAX_REQUESTS = 32;
+			this.MAX_REQUESTS = 128;
 		}
 
 		async addURL(resourceURL) {