message: Fix optional props
diff: @@ -64,10 +64,10 @@ function parseIntWithDefault(val, def) {
  }
  interface IBannedUserProps {
  - canUnban: boolean;
  + canUnban?: boolean;
  member: RoomMember;
  by: string;
  - reason: string;
  + reason?: string;
  }
  export class BannedUser extends React.Component<IBannedUserProps> {
  