Add ChannelType.category enum value.

discord/enums.py

@@ -31,6 +31,7 @@ class ChannelType(Enum):
     private  = 1
     voice    = 2
     group    = 3
+    category = 4
 
     def __str__(self):
         return self.name

docs/api.rst

@@ -468,6 +468,10 @@ All enumerations are subclasses of `enum`_.
     .. attribute:: group
 
         A private group text channel.
+    .. attribute:: category
+
+        A server category channel.
+
 
 .. class:: MessageType