chore(log): update to log 0.4

src/proto/conn.rs

@@ -1048,7 +1048,7 @@ mod tests {
     #[test]
     fn test_conn_body_write_length() {
         extern crate pretty_env_logger;
-        let _ = pretty_env_logger::init();
+        let _ = pretty_env_logger::try_init();
         let _: Result<(), ()> = future::lazy(|| {
             let io = AsyncIo::new_buf(vec![], 0);
             let mut conn = Conn::<_, proto::Chunk, ServerTransaction>::new(io, Default::default());