feat: add (de)serialization derive

Author: sqllqq

CHANGELOG.md

@@ -14,6 +14,7 @@
 - `network::protocol::codec::iproto_key::SQL_INFO` constant
 - Added optional argument timeout to `network::client::Client::connect_with_config`
 - Untagged enum represention as in serde with `#[encode(untagged)]` attribute
+- `tlua::Nil` now supports (de)serialization via serde
 
 ### Changed
 - `network::protocol::codec::IProtoType` uses C language representation

tlua/src/values.rs

@@ -656,7 +656,9 @@ where
     }
 }
 
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[derive(
+    Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord, serde::Serialize, serde::Deserialize,
+)]
 pub struct Nil;
 
 impl_push_read! {Nil,