Clippy fixes

Author: robknight

src/frontend/serialization.rs

@@ -165,7 +165,7 @@ mod tests {
                 "value {:#?} should equal deserialized {:#?}",
                 value, deserialized
             );
-            let expected_deserialized: TypedValue = serde_json::from_str(&expected).unwrap();
+            let expected_deserialized: TypedValue = serde_json::from_str(expected).unwrap();
             assert_eq!(value, expected_deserialized);
         }
     }

src/middleware/serialization.rs

@@ -121,7 +121,7 @@ where
 {
     let mut set = serializer.serialize_seq(Some(value.len()))?;
     let mut sorted_values: Vec<&Value> = value.iter().collect();
-    sorted_values.sort_by(|a, b| a.cmp(b));
+    sorted_values.sort();
     for v in sorted_values {
         set.serialize_element(v)?;
     }