Fix Http::retry so that throw is respected for call signature Http::retry([1,2], throw: false) (#684)

* Fix Http::retry so that throw is respected for call signature Http::retry([1,2], throw: false)

* chore: Remove unused Throwable import and update throw_if and throw_unless functions

---------

Co-authored-by: Deeka Wong <[email protected]>

Author: huangdijia

src/PendingRequest.php

@@ -897,11 +897,15 @@ public function send(string $method, string $url, array $options = [])
                             $response->throw($this->throwCallback);
                         }
 
-                        if ($attempt < $this->tries && $shouldRetry) {
+                        $potentialTries = is_array($this->tries) // @phpstan-ignore-line
+                            ? count($this->tries) + 1
+                            : $this->tries;
+
+                        if ($attempt < $potentialTries && $shouldRetry) {
                             $response->throw();
                         }
 
-                        if ($this->tries > 1 && $this->retryThrow) {
+                        if ($potentialTries > 1 && $this->retryThrow) {
                             $response->throw();
                         }
                     }