make clippy happy

src/protocols.rs

@@ -9,21 +9,20 @@ use tokio::io::AsyncWriteExt;
 
 use crate::{Canvas, Command, Response};
 
-pub trait Parser<R>
+pub(crate) trait Parser<R>
 where
     R: std::marker::Unpin + tokio::io::AsyncBufRead,
 {
     async fn parse(&self, reader: &mut R) -> io::Result<Command>;
 }
 
-pub trait IOProtocol {
+pub(crate) trait IOProtocol {
     fn change_canvas(&mut self, canvas: Canvas) -> io::Result<()>;
 }
 
-pub trait Responder<W>
+pub(crate) trait Responder<W>
 where
     W: AsyncWriteExt + std::marker::Unpin,
 {
     async fn unparse(&self, response: Response, writer: &mut W) -> io::Result<()>;
 }
-