🐛 Fix typing of 'proxies' to indicate the parameter is optional

innertube/clients.py

@@ -49,7 +49,7 @@ def __init__(
  referer: Optional[str] = None,
  locale: Optional[Locale] = None,
  auto: bool = True,
- proxies: ProxiesTypes = None,
+ proxies: Optional[ProxiesTypes] = None,
  ) -> None:
  if client_name is None:
  raise ValueError("Precondition failed: Missing client name")