refactor various patterns for serde_json::from_ elim

bump ruma

Signed-off-by: Jason Volk <jason@zemos.net>

src/service/rooms/state/mod.rs

@@ -9,6 +9,7 @@ use std::{
 
 use conduit::{
 	err,
+	result::FlatOk,
 	utils::{calculate_hash, stream::TryIgnore, IterStream, MutexMap, MutexMapGuard},
 	warn, PduEvent, Result,
 };