fix(UI): script to register at viewer has to require viewer

avoids conditions where registering is attempted when OCA.Viewer is not
established yet

Signed-off-by: Arthur Schiwon <blizzz@arthur-schiwon.de>

lib/Listener/LoadViewerListener.php

@@ -10,6 +10,6 @@
 
 class LoadViewerListener implements IEventListener {
 	public function handle(Event $event): void {
-		Util::addScript('officeonline', 'viewer');
+		Util::addScript('officeonline', 'viewer', 'viewer');
 	}
 }