fixed some issues, testing shutdown

libs/queue/src/queue.ts

@@ -228,7 +228,11 @@ export class Queue {
 
       // Close workers first
       if (this.workers.length > 0) {
-        await Promise.all(this.workers.map(worker => worker.close()));
+        await Promise.all(
+          this.workers.map(async worker => {
+            return await worker.close();
+          })
+        );
         this.workers = [];
         logger.debug('Workers closed', { queueName: this.queueName });
       }