Forward compatibility with react/promise 3

Author: WyriHaximus

.github/workflows/ci.yml

@@ -9,6 +9,7 @@ jobs:
     name: PHPUnit (PHP ${{ matrix.php }})
     runs-on: ubuntu-20.04
     strategy:
+      fail-fast: false
       matrix:
         php:
           - 8.2

composer.json

@@ -41,7 +41,7 @@
         "evenement/evenement": "^3.0 || ^2.0 || ^1.0",
         "react/event-loop": "^1.2",
         "react/dns": "^1.7",
-        "react/promise": "~2.1|~1.2"
+        "react/promise": "^3 || ^2.1 || ^1.2"
     },
     "require-dev": {
         "clue/block-react": "~1.0",

src/Factory.php

@@ -140,7 +140,7 @@ function ($_, $reject) use ($promise) {
                 $reject(new \RuntimeException('Cancelled creating socket during DNS lookup'));
 
                 // (try to) cancel pending DNS lookup, otherwise ignoring its results
-                if ($promise instanceof CancellablePromiseInterface) {
+                if (method_exists($promise, 'cancel')) {
                     $promise->cancel();
                 }
             }