fix: make ClientT covariant (#1708)

Author: AstreaTSS

interactions/client/const.py

@@ -244,7 +244,7 @@ def has_client_feature(feature: str) -> bool:
 if TYPE_CHECKING:
     from interactions import Client
 
-    ClientT = typing_extensions.TypeVar("ClientT", bound=Client, default=Client)
+    ClientT = typing_extensions.TypeVar("ClientT", bound=Client, default=Client, covariant=True)
 else:
     ClientT = TypeVar("ClientT")