Revert "composer package update"

This reverts commit e979959219e95fc6435ad40f7e60b602f8bbd208.

vendor/guzzlehttp/guzzle/src/RetryMiddleware.php

@@ -19,9 +19,6 @@ class RetryMiddleware
     /** @var callable */
     private $decider;
 
-    /** @var callable */
-    private $delay;
-
     /**
      * @param callable $decider     Function that accepts the number of retries,
      *                              a request, [response], and [exception] and
@@ -45,13 +42,13 @@ class RetryMiddleware
     /**
      * Default exponential backoff delay function.
      *
-     * @param int $retries
+     * @param $retries
      *
-     * @return int milliseconds.
+     * @return int
      */
     public static function exponentialDelay($retries)
     {
-        return (int) pow(2, $retries - 1) * 1000;
+        return (int) pow(2, $retries - 1);
     }
 
     /**
@@ -74,11 +71,6 @@ class RetryMiddleware
             );
     }
 
-    /**
-     * Execute fulfilled closure
-     *
-     * @return mixed
-     */
     private function onFulfilled(RequestInterface $req, array $options)
     {
         return function ($value) use ($req, $options) {
@@ -95,11 +87,6 @@ class RetryMiddleware
         };
     }
 
-    /**
-     * Execute rejected closure
-     *
-     * @return callable
-     */
     private function onRejected(RequestInterface $req, array $options)
     {
         return function ($reason) use ($req, $options) {
@@ -116,9 +103,6 @@ class RetryMiddleware
         };
     }
 
-    /**
-     * @return self
-     */
     private function doRetry(RequestInterface $request, array $options, ResponseInterface $response = null)
     {
         $options['delay'] = call_user_func($this->delay, ++$options['retries'], $response);