vendor and env first commit

vendor/guzzlehttp/promises/src/TaskQueueInterface.php

@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GuzzleHttp\Promise;
+
+interface TaskQueueInterface
+{
+    /**
+     * Returns true if the queue is empty.
+     */
+    public function isEmpty(): bool;
+
+    /**
+     * Adds a task to the queue that will be executed the next time run is
+     * called.
+     */
+    public function add(callable $task): void;
+
+    /**
+     * Execute all of the pending task in the queue.
+     */
+    public function run(): void;
+}