replication: support official pgoutput decoding plugin

This is the plugin used during logical replication so it makes sense to
support it here.

Signed-off-by: Petros Angelatos <petrosagg@gmail.com>

Author: petrosagg

postgres-protocol/src/replication/mod.rs

@@ -2,8 +2,10 @@ use std::collections::HashMap;
 
 use crate::message::backend::Parse;
 
+pub mod pgoutput;
 pub mod raw;
 
+pub use pgoutput::PgOutput;
 pub use raw::Raw;
 
 pub trait DecodingPlugin {