Merge pull request #64 from reactphp-parallel/no-need-to-call-close-from-destruct-when-we're-already-closed

No need to call closed from destruct when the proxy is already closed

Author: WyriHaximus

src/Proxy.php

@@ -174,6 +174,10 @@ public function close(): void
 
     public function __destruct()
     {
+        if ($this->closed === TRUE_) {
+            return;
+        }
+
         $this->close();
     }
 }