Starboards don't work inside threads

[xSke]

Describe the bug
Stars on messages in threads don't get posted to the starboard.

To Reproduce
Steps to reproduce the behavior:

1. Make a thread
2. Post a message
3. Add star/etc reactions until the threshold

Expected behavior
I'd expect the message to get posted in the starboard like any other message, but right now it doesn't.

Screenshots

Additional context
You'd likely need to update to a discord.py version that supports api v9, and then the bot should receive events as normal.

[Theelx]

This will not be supported until at least starboard 2.0, and definitely not until @circuitsacul gets back, as nobody else has permission to restart the bot to apply updates.

[circuitsacul]

This will be fixed when the next release of Starboard comes out.