Discord.py dep update 3.1 (#2587)

* Dependency update

discord.py==1.0.1
websockets<7

[style]
black==19.3b0

[Docs]
jinja==2.10.1
urllib3==1.24.2

Changes related to breaking changes from discord.py have also been made
to match

As of this commit, help formatter is back to discord.py's default

redbot/cogs/mod/events.py

@@ -2,7 +2,7 @@ from datetime import datetime
 from collections import defaultdict, deque
 
 import discord
-from redbot.core import i18n, modlog
+from redbot.core import i18n, modlog, commands
 from redbot.core.utils.mod import is_mod_or_superior
 from . import log
 from .abc import MixinMeta
@@ -73,6 +73,7 @@ class Events(MixinMeta):
                     return True
         return False
 
+    @commands.Cog.listener()
     async def on_message(self, message):
         author = message.author
         if message.guild is None or self.bot.user == author:
@@ -92,6 +93,7 @@ class Events(MixinMeta):
         if not deleted:
             await self.check_mention_spam(message)
 
+    @commands.Cog.listener()
     async def on_member_ban(self, guild: discord.Guild, member: discord.Member):
         if (guild.id, member.id) in self.ban_queue:
             self.ban_queue.remove((guild.id, member.id))
@@ -112,6 +114,7 @@ class Events(MixinMeta):
         except RuntimeError as e:
             print(e)
 
+    @commands.Cog.listener()
     async def on_member_unban(self, guild: discord.Guild, user: discord.User):
         if (guild.id, user.id) in self.unban_queue:
             self.unban_queue.remove((guild.id, user.id))
@@ -130,8 +133,8 @@ class Events(MixinMeta):
         except RuntimeError as e:
             print(e)
 
-    @staticmethod
-    async def on_modlog_case_create(case: modlog.Case):
+    @commands.Cog.listener()
+    async def on_modlog_case_create(self, case: modlog.Case):
         """
         An event for modlog case creation
         """
@@ -147,8 +150,8 @@ class Events(MixinMeta):
             msg = await mod_channel.send(case_content)
         await case.edit({"message": msg})
 
-    @staticmethod
-    async def on_modlog_case_edit(case: modlog.Case):
+    @commands.Cog.listener()
+    async def on_modlog_case_edit(self, case: modlog.Case):
         """
         Event for modlog case edits
         """
@@ -161,6 +164,7 @@ class Events(MixinMeta):
         else:
             await case.message.edit(content=case_content)
 
+    @commands.Cog.listener()
     async def on_member_update(self, before: discord.Member, after: discord.Member):
         if before.name != after.name:
             async with self.settings.user(before).past_names() as name_list: