Breaking changes.

• New sticker objects with their respective routes
  • PartialSticker, GuildSticker and StandardSticker.
• Message.content now defaults to None on an empty string
  • This was typed and expected but never enforced
• Application command events have been removed due to Discord no longer sending them
• subscribe no longer returns the function that it is subscribing
• member and author are now separate attributes in GuildMessage* events to cause less confusion
• Guild.is_nsfw has been replaced with Guild.nsfw_level
• Switch cache configurations to flag based configurations
• Application.verify_key renamed to Application.public_key
• Emoji.parse validation removed for the time being
  • This was removed due to a new unicode version breaking the emojis in old versions of Python and Discord not providing any standardization regarding emojis accepted by the API (discord/discord-api-docs#2782). In light of this, we have also removed Emoji.unicode_names as it is not guaranteed to not error
    These will be re-enabled or replaced in the future
• region arguments have been moved from x_guild to x_channel
  • This includes moving the attribute in the objects too
• format_x methods have been renamed to make_x_url
• Message.link has been changed to Message.make_link
  • This is due to Message.link relying on cache and giving bad results when information was not available
• Member.nickname can no longer be Undefined. It will default to None if unset
• Remove preview_asset_hash from Sticker as it has been fully removed from the API
• debug argument removed from VoiceConnection ABC

Features

• Better and cleaner logging
• Base Interaction and slash commands support
  • Message components are still being worked on and can be found here: #684
• Improve 50035 400 error reprs
• All components are now multi-use
• More helpful methods and properties added to objects.
• Even more speedups when using python optimization flags (-O or -OO)
• RESTApp is no longer bound to the loop after the first acquire (#619)
• New ComponentStateConflictError to better handle state in objects
• You can now set the permissions argument to create_role to undefined.Undefined to fallback to default Discord behavior.
• Change in rate limit handling to per bucket locks
  • This will greatly speedup your application and allow for multiple requests to different buckets without having to wait for another request to a different bucket to finish
• Ability to use models in cache calls (same functionality as REST)
• get_guilds_view method has been added to the cache
• Ability to replace attachments when PATCHing messages
  • See edit_message and edit_webhook_message for usage
• New ShardPayloadEvent event
  • This event will trigger when a shard receives a payload
• Improved interface around delete_messages to allow a sequence of messages
• New applications.ApplicationFlags
• ShardReadyEvent now provides the application_id and application_flags
• New USE_APPLICATION_COMMANDS permission
• New Attachment.content attribute
• New Team.name attribute
• New Invite.expires_at attribute and new InviteWithMetadata.uses_left property
• Fetch authorization endpoint + models
  • #rest.fetch_authorization
  • applications.AuthorizationApplication
  • applications.AuthorizationInformation
• Stage channels + methods
• New message flags
  • MessageFlag.EPHEMERAL
  • MessageFlag.LOADING
• New message types
  • MessageType.GUILD_DISCOVERY_DISQUALIFIED
  • MessageType.GUILD_DISCOVERY_REQUALIFIED
  • MessageType.APPLICATION_COMMAND
  • MessageType.GUILD_DISCOVERY_GRACE_PERIOD_INITIAL_WARNING
  • MessageType.GUILD_DISCOVERY_GRACE_PERIOD_FINAL_WARNING
  • MessageType.GUILD_INVITE_REMINDER
• Slash commands OAuth2 scopes (slash command support will come in a future update)
  • OAuth2Scope.APPLICATIONS_COMMANDS
  • OAuth2Scope.APPLICATIONS_COMMANDS_UPDATE
• Application TOS and privacy policy urls
  • Application.terms_of_service_url
  • Application.privacy_policy_url
  • AuthorizationApplication.terms_of_service_url
  • AuthorizationApplication.privacy_policy_url
• New GuildSystemChannelFlag.SUPPRESS_GUILD_REMINDER
• A lot of new REST error codes under errors.RESTErrorCode

Bug fixes

• Improve bot close sequence to always dispatch and wait on lifetime events
• edit_permission_overwrite no longer uses the wrong method
• Permissions being mishandled when de-serializing audit logs
• Incorrect keys in audit logs de-serialization
• De-serialization of Application.public_key to bytes
• Send full heartbeat instead of ACK when receiving heartbeat
• Fix mis-usage of PAYLOAD_ZLIB_STREAM where TRANSPORT_ZLIB_STREAM is being referred to
• Improvement in how hikari manages unknown entities to prevent new entities from breaking entity de-serialization and stopping events from being dispatched
• Global lock is no longer acquired when not using authentication
• UnicodeEmoji is now hashable

Packages bumped

• attrs 20.3.0 -> 21.2.0
• aiohttp 3.7.3 -> 3.7.4.post0
• colorlog 4.7.2 -> 6.4.1
• aiodns 2.0.0 -> 3.0.0