v0.1.1

• Added a property $update_existing to NpcDialogueManager::send() to update existing dialogue
• Added an await-generator based asynchronous mechanism to request dialogues

  $name = "Hello, " . $player->getName();
  $text = "Click the Button!";
  $buttons = [SimpleNpcDialogueButton::simple("Click me")];
  $update_existing = false;
  while(true){
  	try{
  		$response = yield from NpcDialogueManager::request($player, $name, $text, buttons: $buttons, update_existing: $update_existing);
  	}catch(NpcDialogueException){
  		break; // closed, disconnected, or gave invalid response - see NpcDialogueException::getCode()
  	}
  	assert(isset($buttons[$response]));
  	$update_existing = true;
  	$text = "You clicked the button on " . (new DateTimeImmutable())->format("Y-m-d H:i:s");
  }

  https://i.imgur.com/2ky23TD.mp4
• Fixed crashes when sending dialogues to players post-quit