Add PHP8 compatibility to v1.x (#177)

* Add PHP8 compatible requirements
* Readd DNS to allow resolving local shared domains

app/Client/Http/HttpClient.php

@@ -66,6 +66,7 @@ class HttpClient
     protected function createConnector(): Connector
     {
         return new Connector($this->loop, [
+            'dns' => '127.0.0.1',
             'tls' => [
                 'verify_peer' => false,
                 'verify_peer_name' => false,