Changelog

v2.0.0

Rewrote large parts of the code to be more modular and maintainable. There may be some new bugs because of this - please report them through GitHub issues if you encounter any!
Threads, logs, and snippets are now stored in an SQLite database. The bot will migrate old data on the first run.
Small attachments (<2MB) from users can now be relayed as Discord attachments in the modmail thread with the relaySmallAttachmentsAsAttachments config option. Logs will have the link as usual.
Fixed system messages like pins in DMs being relayed to the thread
Fixed channels sometimes being created without a category even when newThreadCategoryId was set
Removed timestamps from threads by default. Logs will still have accurate timestamps. Can be re-enabled with the threadTimestamps config option.
Added !move command to move threads between categories. Can be enabled with the allowMove config option, disabled by default.

Added newThreadCategoryId option. This option can be set to a category ID to place all new threads in that category.

Fixed crash when the bot was unable to find or create a modmail thread
Reduced error log spam in case of network errors from Eris
Fixed unintended error when a message was ignored due to an "accidental thread" word

Added logChannelId option
Some code clean-up. Please open an issue if you encounter any bugs!
The bot now throws an error for unknown options in config.json (assuming they're typos) and tells you if you haven't configured the token or mail guild id.

Fixed user nicknames not showing in new threads
The "manageRoles" permission is no longer required to use commands on the inbox server.
This can be configured with the inboxServerPermission config option.

Commands are now case-insensitive (so !close, !Close, and !CLOSE all work)
The before/after prefixes in edit notifications are now the same length, making it easier to spot the edited part
Non-ASCII names should now result in better channel names (not just "unknown")

Identical edits are now ignored
New thread notification (with @ here ping) is now posted in the thread instead of the inbox server default channel
Thread close notifications no longer ping the user who closed the thread
Received attachments are now only linked once the bot has saved them (should fix embeds)
Replies now use your nickname, if any
Several messages are now ignored for thread creation ("ok", "thanks", and similar)
Logs from !logs are now sorted in descending order (newest first)

More info is now available at the beginning of modmail threads.

Major rewrite. Includes anonymous replies (!ar), stability improvements, and server greeting feature.