fix no-std compatiblity

src/transmission.rs

@@ -1,5 +1,9 @@
 use crate::{Protocol300Message, message};
 use thiserror::Error;
+extern crate alloc;
+
+use alloc::vec;
+use alloc::vec::Vec;
 
 #[derive(Debug, PartialEq, Eq)]
 pub enum Protocol300Transmission {