Updates release notes (#165)

Author: dbbaughe

opendistro-elasticsearch-alerting.release-notes.md

@@ -1,6 +1,18 @@
-## Version 1.3.0.0 (Current)
+## Version 1.4.0.0 (Current)
 
-## Bug Fixes
+### New Features
+  * Adds settings to disable alert history and delete old history indices - [PR #143](https://github.com/opendistro-for-elasticsearch/alerting/pull/143)
+  * Adds support for Elasticsearch 7.4.2 - [PR #141](https://github.com/opendistro-for-elasticsearch/alerting/pull/141)
+  * Adds maven publish task for notification subproject for other plugins to utilize - [PR #97](https://github.com/opendistro-for-elasticsearch/alerting/pull/97)
+
+### Bug Fixes
+  * Removes unsupported HttpInput types which was breaking Alerting Kibana - [PR #162](https://github.com/opendistro-for-elasticsearch/alerting/pull/162)
+  * Fixes missing constructors for Stats when updating to 7.4.2 - [PR #142](https://github.com/opendistro-for-elasticsearch/alerting/pull/142)
+  * Fixes multi node alerting stats API - [PR #128](https://github.com/opendistro-for-elasticsearch/alerting/pull/128)
+
+## 2019-11-14, Version 1.3.0.0
+
+### Bug Fixes
   * Fixes allowing interval to be set with 0 or negative values - [PR #92](https://github.com/opendistro-for-elasticsearch/alerting/pull/92)
   * Cleanup ElasticThreadContextElement - [PR #95](https://github.com/opendistro-for-elasticsearch/alerting/pull/95)