Convert RoomPreviewBar to Typescript

src/stores/ThreepidInviteStore.ts

@@ -53,6 +53,8 @@ export interface IOOBData {
     name?: string; // The room's name
     avatarUrl?: string; // The mxc:// avatar URL for the room
     inviterName?: string; // The display name of the person who invited us to the room
+    // eslint-disable-next-line camelcase
+    room_name?: string; // The name of the room, to be used until we are told better by the server
 }
 
 const STORAGE_PREFIX = "mx_threepid_invite_";