Add support of guzzlehttp/promises:2.0

composer.json

@@ -20,6 +20,7 @@
         "ext-json": "*",
         "composer/semver": "^1.4|^2.0|^3.0",
         "guzzlehttp/guzzle": "^6.3|^7.0",
+        "guzzlehttp/promises": "^1.0|^2.0",
         "illuminate/http": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|^6.0|^7.0|^8.0|^9.0|^10.0",
         "illuminate/routing": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|^6.0|^7.0|^8.0|^9.0|^10.0",
         "illuminate/support": "~5.5.0|~5.6.0|~5.7.0|~5.8.0|^6.0|^7.0|^8.0|^9.0|^10.0"

src/Classes/Composer.php

@@ -5,6 +5,7 @@
 use Composer\Semver\Semver;
 use Composer\Semver\VersionParser;
 use GuzzleHttp\Client;
+use GuzzleHttp\Promise\Utils;
 use GuzzleHttp\Psr7\Response;
 use Illuminate\Support\Arr;
 use Illuminate\Support\Collection;
@@ -68,7 +69,7 @@ public function getPackagesData()
                             });
                     });
 
-                \GuzzleHttp\Promise\settle($promises)->wait();
+                $this->waitForPromises($promises);
             });
 
         return $packages;
@@ -223,4 +224,16 @@ private function getVersionsFromPackagist(string $package)
 
         return $versions;
     }
+
+    private function waitForPromises(array $promises) {
+
+        if (method_exists(Utils::class, 'settle')){
+            Utils::settle($promises)->wait();
+
+            return;
+        }
+
+        // Support of guzzle/promises < 1.4
+        \GuzzleHttp\Promise\settle($promises)->wait();
+    }
 }