Dpytest

- Merge hint files into .py files
- Use typing export of Pattern

- Add content type to attachments
- Overwrite _guild_needs_chunking (fix for asyncio wait_for errors)

- Bump version (sould have done that with 0.0.23, since many changes have been commited)
- Bug fix with role_mentions=None being not iterable.

- Support for discord.py 1.7.1
- Attachments allowed on messages
- verify_embed without test fixed
- Add members intent
- Added more testing