chore(Session.new_window): Missing typing

Author: tony

libtmux/session.py

@@ -209,7 +209,7 @@ def new_window(
         wformats = ["session_name", "session_id"] + formats.WINDOW_FORMATS
         tmux_formats = ["#{%s}" % f for f in wformats]
 
-        window_args = tuple()
+        window_args: t.Tuple = tuple()
 
         if not attach:
             window_args += ("-d",)