fix: use nickname instead of name for sender displayname (#70)

* fix: use nickname instead of name for sender displayname

* fix: use group member alias in group chats

Author: jiz4oh

efb_wechat_comwechat_slave/ComWechat.py

@@ -842,7 +842,7 @@ def send_text(self, wxid: ChatID, msg: Message) -> 'Message':
                 else:
                     msgid = msg.target.uid
                     sender = msg.target.author.uid
-                    displayname = msg.target.author.name
+                    displayname = self.group_members.get(wxid,{}).get(sender, self.get_nickname_by_wxid(sender))
                     content = escape(msg.target.vendor_specific.get("wx_xml", ""), {
                         "\n": "
",
                         "\t": "	",