[V3] RC1 Compliance, fixes

RC1 changes on all cogs. Tools has inrole fixed, now will display appropriately if 0 people are in the specified role. Timezone: removed the time place command as timezoneapi.io has changed to a paid service.

seen/seen.py

@@ -4,7 +4,10 @@ import time
 from datetime import datetime
 from redbot.core import Config, commands
 
-class Seen:
+
+BaseCog = getattr(commands, "Cog", object)
+
+class Seen(BaseCog):
     """Shows last time a user was seen in chat"""
     def __init__(self, bot):
         self.bot = bot