Prepare for release of version 2.0.0.dev102 (#790)

Co-authored-by: hikari-bot <90276125+hikari-bot[bot]@users.noreply.github.com>

Author: hikari-bot[bot]

CHANGELOG.md

@@ -6,4 +6,57 @@ This file is updated every release with the use of `towncrier` from the fragment
 
 .. towncrier release notes start
 
+Hikari 2.0.0.dev102 (2021-09-19)
+================================
+
+Deprecations and Removals
+-------------------------
+
+- `MessageType.APPLICATION_COMMAND` renamed to `MessageType.CHAT_INPUT` ([#775](https://github.com/hikari-py/hikari/issues/775))
+- Removal of deprecated `hikari.impl.bot.BotApp` and `hikari.traits.BotAware`
+  - Use `hikari.impl.bot.GatewayBot` and `hikari.traits.GatewayBotAware` respectively instead ([#778](https://github.com/hikari-py/hikari/issues/778))
+
+
+Features
+--------
+
+- Message components support ([#684](https://github.com/hikari-py/hikari/issues/684))
+- Web dashboard example with `rillrate` ([#752](https://github.com/hikari-py/hikari/issues/752))
+- Sticker methods to PartialGuild ([#754](https://github.com/hikari-py/hikari/issues/754))
+- Sticker audit log event types ([#756](https://github.com/hikari-py/hikari/issues/756))
+- Helpful Application object methods ([#757](https://github.com/hikari-py/hikari/issues/757))
+- Missing audit log change keys ([#759](https://github.com/hikari-py/hikari/issues/759))
+- Retry request on 500, 502, 503 and 504 errors
+  - Default retry count is 3, with a hard top of 5. This can be changed with the `max_retries` argument ([#763](https://github.com/hikari-py/hikari/issues/763))
+- New `is_for_emoji` methods to relevant reaction events ([#770](https://github.com/hikari-py/hikari/issues/770))
+- Add `USE_EXTERNAL_STICKERS` permission ([#774](https://github.com/hikari-py/hikari/issues/774))
+- Add `MessageType.CONTEXT_MENU_COMMAND` message type ([#775](https://github.com/hikari-py/hikari/issues/775))
+- Add `ApplicationCommand.version` ([#776](https://github.com/hikari-py/hikari/issues/776))
+
+
+Bugfixes
+--------
+
+- Handling of interaction models passed to the webhook message endpoints as the "webhook" field ([#759](https://github.com/hikari-py/hikari/issues/759))
+- Fix passing `embeds` arguments in `create_interaction_response` and `edit_initial_response` endpoints
+  - Fix deserialization of embeds in `create_interaction_response`
+  - Fix `TypeErrors` raised in `edit_initial_response` when passing a list of embeds ([#779](https://github.com/hikari-py/hikari/issues/779))
+- Improve typing for message objects and message update methods
+  - Fix the use of `typing.Optional` where `undefined.UndefinedOr` should have been used
+  - Remove trying to acquire guild_id from the cached channel on PartialMessage
+    - Instead, clearly document the issue Discord imposes by not sending the guild_id
+  - `is_webhook` will now return `undefined.UNDEFINED` if the information is not available 
+  - Fix logic in `is_human` to account for the changes in the typing
+  - Set `PartialMessage.member` to `undefined.UNDEFINED` when Discord edit the message to display an embed/attachment ([#783](https://github.com/hikari-py/hikari/issues/783))
+- `CommandOption.value` will now be cast to a `Snowflake` for types 6-9 ([#785](https://github.com/hikari-py/hikari/issues/785))
+
+
+Improved Documentation
+----------------------
+
+- Fix typo in Colorish docstring ([#755](https://github.com/hikari-py/hikari/issues/755))
+- Remove duplicate raise type in REST and guilds docstrings ([#768](https://github.com/hikari-py/hikari/issues/768))
+- Fix various spelling mistakes ([#773](https://github.com/hikari-py/hikari/issues/773))
+
+
 *This file was added during the development of version 2.0.0.dev102, so nothing before that is documented.*