Add ecto_watch (#4883)

README.md

@@ -1238,6 +1238,7 @@ There are [other sites with curated lists of elixir packages](#other-awesome-lis
 * [ecto_shortcuts](https://github.com/MishaConway/ecto_shortcuts) - Shortcuts for common operations in ecto.
 * [ecto_shortuuid](https://github.com/gpedic/ecto_shortuuid) - Ecto type which adds support for [ShortUUIDs](https://github.com/gpedic/ex_shortuuid).
 * [ecto_validation_case](https://github.com/danielberkompas/ecto_validation_case) - Simplify your Ecto model validation tests. Loosely inspired by shoulda matchers, but simpler.
+* [ecto_watch](https://github.com/cheerfulstoic/ecto_watch) - Allows you to easily get notifications about database changes directly from PostgreSQL.
 * [ectophile](https://github.com/gjaldon/ectophile) - Ecto extension to instantly support file uploads in models.
 * [elastic](https://github.com/radar/elastic) - A thin-veneer over HTTPotion to help you talk to Elastic Search.
 * [elastix](https://github.com/werbitzky/elastix) - A simple Elastic REST client written in Elixir.