Add post_blank to the rust types.

src/intermediate/italic.rs

@@ -1,3 +1,5 @@
+use organic::types::StandardProperties;
+
 use super::macros::intermediate;
 use super::IObject;
 
@@ -6,6 +8,7 @@ use crate::error::CustomError;
 #[derive(Debug, Clone)]
 pub(crate) struct IItalic {
     pub(crate) children: Vec<IObject>,
+    pub(crate) post_blank: organic::types::PostBlank,
 }
 
 intermediate!(
@@ -22,6 +25,9 @@ intermediate!(
             ret
         };
 
-        Ok(IItalic { children })
+        Ok(IItalic {
+            children,
+            post_blank: original.get_post_blank(),
+        })
     }
 );