Port everything over to AsXml

parsers/src/attention.rs

@@ -3,13 +3,13 @@
 // This Source Code Form is subject to the terms of the Mozilla Public
 // License, v. 2.0. If a copy of the MPL was not distributed with this
 // file, You can obtain one at http://mozilla.org/MPL/2.0/.
-use xso::{FromXml, IntoXml};
+use xso::{AsXml, FromXml};
 
 use crate::message::MessagePayload;
 use crate::ns;
 
 /// Requests the attention of the recipient.
-#[derive(FromXml, IntoXml, Debug, Clone, PartialEq)]
+#[derive(FromXml, AsXml, Debug, Clone, PartialEq)]
 #[xml(namespace = ns::ATTENTION, name = "attention")]
 pub struct Attention;