Revert incorrect default limit (Fixes #291)

tidalapi/user.py

@@ -209,7 +209,7 @@ def public_playlists(
         )
 
     def playlist_and_favorite_playlists(
-        self, limit: Optional[int] = None, offset: int = 0
+        self, limit: int = 50, offset: int = 0
     ) -> List[Union["Playlist", "UserPlaylist"]]:
         """Get the playlists created by the user, and the playlists favorited by the
         user. This function is limited to 50 by TIDAL, requiring pagination.