Inconsistency with the latest version of yolov5

[zhiqwang]

Seems that there is a bug caused by the incompatibility with the latest version of YOLOv5 after ultralytics/yolov5#4833 .

Discussed in #233

^{Originally posted by 123556666 November 22, 2021}

I got a RuntimeError when loading custom model trained with the latest version of YOLOv5.

RuntimeError: Error(s) in loading state_dict for Model:
	Missing key(s) in state_dict: "model.33.anchor_grid".

[zhiqwang]

Hi @123556666 ,

We update the upstream YOLOv5 in #235 , I think this could fix the inconsistency problem, and as such I'm closing this ticket. Please pull the main brach of yolort and check whether this update will fix your problem.

Fell free to create another ticket if you have more questions.