CHANGELOG.md in disco-0.3.0 vs CHANGELOG.md in disco-0.3.1

@@ -1,4 +1,8 @@
+## 0.3.1 (2022-07-10)
+
+- Added support for JSON serialization
+
 ## 0.3.0 (2022-03-22)
 
 - Changed `item_id` to `user_id` for `similar_users`
 - Changed warning to an error when `value` passed to `fit`
 - Changed to use Faiss over NGT for `optimize_item_recs` and `optimize_similar_users` when both are installed