fix: trim \r from message

mime type couldn't be parsed because of this

src/lib.rs

@@ -79,6 +79,9 @@ impl Client {
                 message.push(buf[0].into());
             }
         }
+        if message.last().is_some_and(|c| c == &b'\r') {
+            message.pop();
+        }
         let message = String::from_utf8(message)?;
         Ok(Response::new(status, message, stream))
     }