Add new incident message types

Co-authored-by: Danny <1695103+Rapptz@users.noreply.github.com>

discord/enums.py

@@ -247,6 +247,10 @@ class MessageType(Enum):
     stage_raise_hand = 30
     stage_topic = 31
     guild_application_premium_subscription = 32
+    guild_incident_alert_mode_enabled = 36
+    guild_incident_alert_mode_disabled = 37
+    guild_incident_report_raid = 38
+    guild_incident_report_false_alarm = 39
 
 
 class SpeakingState(Enum):