Update config to extend from ChangeNotifier MixIn
from plextraktsync.config.ConfigLoader import ConfigLoader
from plextraktsync.config.ConfigMergeMixin import ConfigMergeMixin
+from plextraktsync.mixin.ChangeNotifier import ChangeNotifier
from plextraktsync.path import (cache_dir, config_file, config_yml,
default_config_file, env_file)
-class Config(dict, ConfigMergeMixin):
+class Config(ChangeNotifier, ConfigMergeMixin, dict):
env_keys = [
"PLEX_BASEURL", # unused after 0.24.0
"PLEX_FALLBACKURL", # legacy, used before 0.18.21
