Update changelog

CHANGELOG.md

@@ -8,12 +8,14 @@
 - Respect --project-dir in dbt clean command ([#2840](https://github.com/fishtown-analytics/dbt/issues/2840), [#2841](https://github.com/fishtown-analytics/dbt/pull/2841))
 - Fix Redshift adapter `get_columns_in_relation` macro to push schema filter down to the `svv_external_columns` view ([#2855](https://github.com/fishtown-analytics/dbt/issues/2854))
 - Add `unixodbc-dev` package to testing docker image ([#2859](https://github.com/fishtown-analytics/dbt/pull/2859))
+- Increased the supported relation name length in postgres from 29 to 51 ([#2850](https://github.com/fishtown-analytics/dbt/pull/2850))
 
 Contributors:
 - [@feluelle](https://github.com/feluelle) ([#2841](https://github.com/fishtown-analytics/dbt/pull/2841))
 - [ran-eh](https://github.com/ran-eh) [#2596](https://github.com/fishtown-analytics/dbt/pull/2596)
 - [@hochoy](https://github.com/hochoy) [#2851](https://github.com/fishtown-analytics/dbt/pull/2851)
 - [@brangisom](https://github.com/brangisom) [#2855](https://github.com/fishtown-analytics/dbt/pull/2855)
+- [@elexisvenator](https://github.com/elexisvenator) ([#2850](https://github.com/fishtown-analytics/dbt/pull/2850))
 
 ## dbt 0.19.0b1 (October 21, 2020)