Add post_blank to the rust types.

src/context/strike_through.rs

@@ -12,6 +12,7 @@ use super::RenderObject;
 #[serde(rename = "strike_through")]
 pub(crate) struct RenderStrikeThrough {
     children: Vec<RenderObject>,
+    post_blank: organic::types::PostBlank,
 }
 
 render!(
@@ -28,6 +29,9 @@ render!(
             ret
         };
 
-        Ok(RenderStrikeThrough { children })
+        Ok(RenderStrikeThrough {
+            children,
+            post_blank: original.post_blank,
+        })
     }
 );