v0.2.1

• Added support for double puppeting from other servers (started by @abmantis in #368).
  • This does not apply to post-login backfilling, as it's not possible to use MSC2716's /batch_send with users from other servers.
• Added config updater similar to mautrix-python bridges.
• Added support for responding to retry receipts (to automatically resolve other devices not being able to decrypt messages from the bridge).
• Added sync command to resync contact and group info to Matrix (not to be confused with the pre-v0.2.0 sync command which also did backfill and other such things).
• Added warning when reacting to messages in portal rooms (thanks to @abmantis in #373).
  • Can be disabled with the reaction_notices config option.
• Fixed WhatsApp encryption failing if other user reinstalled the app.
  • New identities will now be auto-trusted, and if identity_change_notices is set to true, a notice about the change will be sent to the private chat portal.
• Fixed contact info sync at login racing with portal/puppet creation and therefore not being synced properly.
• Fixed read receipts from WhatsApp on iOS that mark multiple messages as read not being handled properly.
• Fixed backfilling not working when double puppeting was not enabled at all.
• Fixed portals not being saved on SQLite.
• Fixed relay mode using old name for users after displayname change.
• Fixed displayname not being HTML-escaped in relay mode message templates.