Forward compatibility with upcoming Promise v3

Author: clue

composer.json

@@ -12,13 +12,13 @@
     ],
     "require": {
         "php": ">=5.3",
-        "react/promise": "^2.5 || ^1.2.1",
+        "react/promise": "^3 || ^2.9 || ^1.2.1",
         "react/stream": "^1.2"
     },
     "require-dev": {
         "clue/ndjson-react": "^1.0",
         "phpunit/phpunit": "^9.6 || ^5.7 || ^4.8.36",
-        "react/http": "^1.4"
+        "react/http": "^1.8"
     },
     "autoload": {
         "psr-4": {

src/Transformer.php

@@ -4,7 +4,6 @@
 
 use Evenement\EventEmitter;
 use InvalidArgumentException;
-use React\Promise\CancellablePromiseInterface;
 use React\Stream\DuplexStreamInterface;
 use React\Stream\Util;
 use React\Stream\WritableStreamInterface;
@@ -771,7 +770,7 @@ public function close()
         $this->queued = array();
 
         foreach ($this->promises as $promise) {
-            if ($promise instanceof CancellablePromiseInterface) {
+            if ($promise instanceof PromiseInterface && \method_exists($promise, 'cancel')) {
                 $promise->cancel();
             }
         }

tests/TransformerTest.php

@@ -55,7 +55,7 @@ public function testWriteDoesEmitDrainEventAfterHandlerResolves()
         $through->write('hello');
 
         $through->on('drain', $this->expectCallableOnce());
-        $deferred->resolve();
+        $deferred->resolve(null);
     }
 
     public function testResumeAfterWriteAfterPauseEmitsDrainEventIfHandlerResolves()
@@ -167,7 +167,7 @@ public function testWriteAfterWriteDoesInvokeHandlerAgainAfterPreviousHandlerRes
         $through->write('hello');
         $through->write('world');
 
-        $deferred->resolve();
+        $deferred->resolve(null);
 
         $this->assertEquals(array('hello', 'world'), $pending);
     }
@@ -362,7 +362,7 @@ public function testEndWithDataAfterWriteAfterWriteDoesInvokeHandlerAgainInCorre
         $through->write('hello');
         $through->write('world');
         $through->end('again');
-        $deferred->resolve();
+        $deferred->resolve(null);
 
         $this->assertEquals(array('hello', 'world', 'again'), $pending);
     }
@@ -377,7 +377,7 @@ public function testEndDoesNotEmitDrainEventAfterHandlerResolves()
         $through->end('hello');
 
         $through->on('drain', $this->expectCallableNever());
-        $deferred->resolve();
+        $deferred->resolve(null);
     }
 
     public function testEndAfterCloseIsNoop()