Merge pull request #260 from phpfui/PHP85

Php 8.5 support

Author: zbateson

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest]
-        php: [8.4, 8.3, 8.2, 8.1, 8.0]
+        php: [8.5, 8.4, 8.3, 8.2, 8.1, 8.0]
         stability: [prefer-stable]
 
     name: P${{ matrix.php }} - ${{ matrix.stability }} - ${{ matrix.os }}

src/Message/MessagePart.php

@@ -67,12 +67,12 @@ public function __construct(
 
     public function attach(SplObserver $observer) : void
     {
-        $this->observers->attach($observer);
+        $this->observers->offsetSet($observer);
     }
 
     public function detach(SplObserver $observer) : void
     {
-        $this->observers->detach($observer);
+        $this->observers->offsetUnset($observer);
     }
 
     public function notify() : void