Implement MPuback::write

Signed-off-by: Matthias Beyer <[email protected]>

mqtt-format/src/v5/packets/puback.rs

@@ -11,6 +11,8 @@ use crate::v5::properties::define_properties;
 use crate::v5::variable_header::PacketIdentifier;
 use crate::v5::variable_header::ReasonString;
 use crate::v5::variable_header::UserProperties;
+use crate::v5::write::WResult;
+use crate::v5::write::WriteMqttPacket;
 use crate::v5::MResult;
 
 crate::v5::reason_code::make_combined_reason_code! {
@@ -70,4 +72,10 @@ impl<'i> MPuback<'i> {
         })
         .parse_next(input)
     }
+
+    pub async fn write<W: WriteMqttPacket>(&self, buffer: &mut W) -> WResult<W> {
+        self.packet_identifier.write(buffer).await?;
+        self.reason.write(buffer).await?;
+        self.properties.write(buffer).await
+    }
 }