adding serde to the data model: triple

lib/oxrdf/src/triple.rs

@@ -778,7 +778,7 @@ impl<'a> From<TermRef<'a>> for Term {
 /// );
 /// # Result::<_,oxrdf::IriParseError>::Ok(())
 /// ```
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub struct Triple {
     /// The [subject](https://www.w3.org/TR/rdf11-concepts/#dfn-subject) of this triple.
     pub subject: Subject,
@@ -1147,7 +1147,7 @@ impl<'a> From<GraphNameRef<'a>> for GraphName {
 /// );
 /// # Result::<_,oxrdf::IriParseError>::Ok(())
 /// ```
-#[derive(Eq, PartialEq, Debug, Clone, Hash)]
+#[derive(Eq, PartialEq, Debug, Clone, Hash, Serialize, Deserialize)]
 pub struct Quad {
     /// The [subject](https://www.w3.org/TR/rdf11-concepts/#dfn-subject) of this triple.
     pub subject: Subject,