[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.

wolfram/wolfram.py

@@ -4,7 +4,9 @@ from redbot.core import Config, commands, checks
 import xml.etree.ElementTree as ET
 
 
-class Wolfram:
+BaseCog = getattr(commands, "Cog", object)
+
+class Wolfram(BaseCog):
     """Ask Wolfram Alpha a question."""
 
     def __init__(self, bot):