add constants for Chat.type and ChatMember.status

telegram/chat.py

@@ -42,6 +42,11 @@ class Chat(TelegramObject):
         type (Optional[str]):
     """
 
+    PRIVATE = 'private'
+    GROUP = 'group'
+    SUPERGROUP = 'supergroup'
+    CHANNEL = 'channel'
+
     def __init__(self, id, type, **kwargs):
         # Required
         self.id = int(id)

telegram/chatmember.py

@@ -34,6 +34,12 @@ class ChatMember(TelegramObject):
         status (str):
     """
 
+    CREATOR = 'creator'
+    ADMINISTRATOR = 'administrator'
+    MEMBER = 'member'
+    LEFT = 'left'
+    KICKED = 'kicked'
+
     def __init__(self, user, status, **kwargs):
         # Required
         self.user = user