Sliding sync v2 (#775)

* Adopt latest rust Sliding Sync changes

* Bump SDK, converge on similar to configure both sliding sync lists

* Adopt latest SDK version, fix breaking changes

* Fix unit tests

ElementX/Sources/Services/Timeline/TimelineItemContent/MessageTimelineItem.swift

@@ -42,10 +42,6 @@ struct MessageTimelineItem<Content: MessageContentProtocol> {
         item.content().asMessage()?.isEdited() == true
     }
 
-    var inReplyTo: String? {
-        item.content().asMessage()?.inReplyTo()
-    }
-    
     var sender: String {
         item.sender()
     }