when dealing with on_friendship, internal error <list index out of range> occurs

[fish-ball]

I'm trying to fix the bug wechaty/python-wechaty#74

And finally turns out that when the code run in to HostiePuppet.friendship_payload() the below error occured.

2020-06-25 19:28:48,885 - Wechaty - ERROR - internal error
ERROR:Wechaty:internal error

[fish-ball]

Finally I found that the original treatment

        return FriendshipPayload(**response.to_dict())

is redundant, and leads to a wrong result.

Just return the response do the trick.