Use react/async for promise wait

Move and also bump phpunit/phpunit to require dev as it was wrongfully place in require in #52.

Author: WyriHaximus

composer.json

@@ -11,16 +11,17 @@
         }
     ],
     "require": {
-        "php": "^7.1|^8.0",
+        "php": "^8.1",
         "php-http/httplug": "^2.0",
         "react/http": "^1.0",
         "react/event-loop": "^1.2",
         "php-http/discovery": "^1.0",
-        "phpunit/phpunit": "^9.3.11 || ^7"
+        "react/async": "^4"
     },
     "require-dev": {
         "php-http/client-integration-tests": "^3.0",
         "php-http/message": "^1.0",
+        "phpunit/phpunit": "^9.5",
         "nyholm/psr7": "^1.3"
     },
     "provide": {

src/Promise.php

@@ -7,6 +7,7 @@
 use Http\Promise\Promise as HttpPromise;
 use Psr\Http\Message\RequestInterface;
 use Psr\Http\Message\ResponseInterface;
+use function React\Async\await;
 use React\EventLoop\LoopInterface;
 use React\Promise\PromiseInterface;
 use RuntimeException;
@@ -114,12 +115,9 @@ public function getState()
      */
     public function wait($unwrap = true)
     {
-        $loop = $this->loop;
-        while (HttpPromise::PENDING === $this->getState()) {
-            $loop->futureTick(function () use ($loop) {
-                $loop->stop();
-            });
-            $loop->run();
+        try {
+            await($this->promise);
+        } catch (\Throwable) {
         }
 
         if ($unwrap) {