feat: room version 12

and set it as the default version

src/config/mod.rs

@@ -725,5 +725,5 @@ fn default_openid_token_ttl() -> u64 {
 
 // I know, it's a great name
 pub fn default_default_room_version() -> RoomVersionId {
-    RoomVersionId::V10
+    RoomVersionId::V12
 }

src/service/globals/mod.rs

@@ -187,6 +187,7 @@ impl Service {
             RoomVersionId::V9,
             RoomVersionId::V10,
             RoomVersionId::V11,
+            RoomVersionId::V12,
         ];
         // Experimental, partially supported room versions
         let unstable_room_versions = vec![RoomVersionId::V3, RoomVersionId::V4, RoomVersionId::V5];