Modmail v4 is out with support for discord.py v2 and a variety of miscellaneous changes.

Breaking

• Modmail now requires Message Content privileged intent.
• Upgraded to discord.py v2.0 (internal changes, GH [#2990]).
• Python 3.8 or higher is required.
• Asyncio changes (gist)
• Plugin registry is purged and all developers have to re-apply due to breaking changes.

Added

• use_hoisted_top_role config to use change how default mod tags work, see v3.10.0#Added for details. (PR [#3093])
• require_close_reason config to require a reason to close a thread. (GH [#3107])
• plain_snippets config to force all snippets to be plain. (GH [#3083])
• ?fpareply and ?fpreply to reply to messages with variables plainly.
• use_nickname_channel_name config to use nicknames instead of usernames for channel names. (GH [#3112])
• use_random_channel_name config to use random nicknames vaguely tied to user ID. It is unable to be computed in reverse. (GH [#3143])
• show_log_url_button config to show Log URL button. (GH [#3122])
• Select menus for certain paginators.
• Title field in ?logs. (GH [#3142])
• Snippets can be used in aliases. (GH [#3108], PR [#3124])
• ?snippet make/create as aliases to ?snippet add. (GH [#3172], PR [#3174])

Improved

• Modmail now uses per-server avatars if applicable. (GH [#3048])
• Use discord relative timedeltas. (GH [#3046])
• Use discord native buttons for all paginator sessions.
• ?help and ?blocked paginator sessions now have better multi-page UI.
• Autoupdate now automatically updates pipenv dependencies if possible.

Fixed

• Several minor typos. (PR [#3095], PR [#3116])
• Certain cases where fallback categories were not working as intended. (PR [#3109])
• ?contact would create in a random category in silent mode. (GH [#3091], PR [#3092])
• Certain cases where ?close would fail if closer isn't in cache. (GH [#3104], PR [#3105])
• Stickers now work in Modmail.
• Large server sizes results in Guild.name == None. (GH [#3088])
• Attachments now work on plain replies. (GH [#3102])
• Support LOTTIE stickers. (GH [#3119])
• Editing notes now work. (GH [#3094])
• Commands now work in threads.
• Audit log searching now properly works.
• Old data causing ?blocked to fail. (GH [#3131])
• Delete channel auto close functionality now works.
• Improved error handling for autoupdate. (PR [#3161])
• Skip loading of already-loaded cog. (PR [#3172])
• Respect plugin's cog_command_error. (GH [#3170], PR [#3178])
• Use silent as a typing literal for contacting. (GH [#3179])

Internal

• Improve regex parsing of channel topics. (GH [#3114], PR [#3111])
• Add warning if deploying on a developmental version.
• Extensions are now loaded on_connect.
• MongoDB v5.0 clients are now supported. (GH [#3126])
• Bump python-dotenv to v0.20.0, support for python 3.10
• Bump emoji to v1.7.0
• Bump aiohttp to v3.8.1
• Bump lottie to v0.6.11
• Remove deprecated core/decorators.py from v3.3.0

Full Changelog: https://github.com/kyb3r/modmail/compare/v3.10.2...v4.0.0