Update changelog

CHANGELOG.md

@@ -3,6 +3,10 @@
 ### Features
 - dbt will compare configurations using the un-rendered form of the config block in dbt_project.yml ([#2713](https://github.com/fishtown-analytics/dbt/issues/2713), [#2735](https://github.com/fishtown-analytics/dbt/pull/2735))
 - Added state and defer arguments to the RPC client, matching the CLI ([#2678](https://github.com/fishtown-analytics/dbt/issues/2678), [#2736](https://github.com/fishtown-analytics/dbt/pull/2736))
+- Added ability to snapshot hard-deleted records (opt-in with `invalidate_hard_deletes` config option). ([#249](https://github.com/fishtown-analytics/dbt/issues/249), [#2749](https://github.com/fishtown-analytics/dbt/pull/2749))
+
+Contributors:
+- [@joelluijmes](https://github.com/joelluijmes) ([#2749](https://github.com/fishtown-analytics/dbt/pull/2749))
 
 ## dbt 0.18.0 (September 03, 2020)