feat: init serialize support

Signed-off-by: Woshiluo Luo <woshiluo.luo@outlook.com>

Author: woshiluo

src/lib.rs

@@ -20,6 +20,7 @@ extern crate alloc;
 
 pub mod de;
 pub mod error;
+pub mod ser;
 pub mod utils;
 
 mod common;