feat(server): add server lifecycle events (#175)

Signed-off-by: Edouard Courty <edouard.courty2@gmail.com>

src/Server/Builder.php

@@ -564,6 +564,7 @@ final class Builder
             sessionFactory: $sessionFactory,
             sessionStore: $sessionStore,
             logger: $logger,
+            eventDispatcher: $this->eventDispatcher,
         );
 
         return new Server($protocol, $logger);