Update roadmap

ROADMAP.md

@@ -16,7 +16,7 @@
     * [x] Mentions
   * [x] Message redactions<sup>[1]</sup>
   * [ ] Message reactions
-  * [ ] Read receipts
+  * [x] Read receipts
   * [ ] Power level
   * [ ] Membership actions
     * [ ] Invite
@@ -42,11 +42,13 @@
   * [ ] Message reactions
   * [x] Message history
   * [ ] Read receipts
+    * [ ] On backfill
+    * [x] On live event
   * [ ] Admin status
-  * [ ] Membership actions
-    * [ ] Add member
-    * [ ] Remove member
-    * [ ] Leave
+  * [x] Membership actions
+    * [x] Add member
+    * [x] Remove member
+    * [x] Leave
   * [ ] Chat metadata changes
     * [x] Title
     * [ ] Avatar
@@ -59,9 +61,9 @@
 * Misc
   * [x] Multi-user support
   * [x] Shared group chat portals
-  * [ ] Automatic portal creation
+  * [x] Automatic portal creation
     * [x] At startup
-    * [ ] When added to chat
+    * [x] When added to chat
     * [x] When receiving message
   * [ ] Private chat creation by inviting Matrix puppet of KakaoTalk user to new room
     * [x] For existing recently-updated KakaoTalk channels