refactor(serde): use serde derive macro

src/elements/macros.rs

@@ -2,9 +2,11 @@ use jetscii::Substring;
 use memchr::memchr2;
 
 #[cfg_attr(test, derive(PartialEq))]
+#[cfg_attr(feature = "serde", derive(serde::Serialize))]
 #[derive(Debug)]
 pub struct Macros<'a> {
     pub name: &'a str,
+    #[cfg_attr(feature = "serde", serde(skip_serializing_if = "Option::is_none"))]
     pub arguments: Option<&'a str>,
 }