Return the maximum ID of all abuse log entries instead of the last ID.

This fixes an issue where abuse log entries are returned out of order from the
API, leading to constantly repeating abuse filter messages being sent to
Discord.

src/wiki.py

@@ -232,7 +232,7 @@ class Wiki(object):
 			if entry["id"] <= recent_id:
 				continue
 			self.abuse_processor(entry)
-		return entry["id"]
+		return max([entry["id"] for entry in abuse_log])
 
 	def fetch_changes(self, amount):
 		"""Fetches the :amount: of changes from the wiki.