Add highest verification level.

discord/enums.py

@@ -75,6 +75,8 @@ class VerificationLevel(Enum):
     medium            = 2
     high              = 3
     table_flip        = 3
+    highest           = 4
+    double_table_flip = 4
 
     def __str__(self):
         return self.name

docs/api.rst

@@ -679,6 +679,13 @@ All enumerations are subclasses of `enum`_.
     .. attribute:: table_flip
 
         An alias for :attr:`high`.
+    .. attribute:: highest
+
+        Member must have a verified phone on their Discord account.
+
+    .. attribute:: double_table_flip
+
+        An alias for :attr:`highest`.
 
 .. class:: ContentFilter