[Commands] Adds support for non interactive use (#2746)

Adds assume_yes to context
Changes cleanup's 100+ check
Changes cog update.

redbot/cogs/cleanup/cleanup.py

@@ -33,6 +33,9 @@ class Cleanup(commands.Cog):
         Tries its best to cleanup after itself if the response is positive.
         """
 
+        if ctx.assume_yes:
+            return True
+
         prompt = await ctx.send(
             _("Are you sure you want to delete {number} messages? (y/n)").format(number=number)
         )