Reduced & updated dependencies.

By default, messages larger than 2.000 characters (sent via tells) get sent via slaves, if these exist.
Fixes #3

modules/core/private_channel/private_channel_controller.py

@@ -141,10 +141,7 @@ class PrivateChannelController:
         if len(banned) > 0:
             out += f'The Character <highlight>{", ".join(banned)}</highlight> is <red>banned</red>, ' \
                    f'and cannot be invited.'
-        if request.channel == "priv":
-            return out.strip("\n")
-        else:
-            self.bot.send_mass_message(request.sender.char_id, out.strip("\n"))
+        return out.strip("\n")
 
     @command(command="kick", params=[Character("character")], access_level="moderator",
              description="Kick a character from the private channel")