update release notes for version 1.0.0 (#79)

Author: penghuo

opendistro-elasticsearch-sql.release-notes

@@ -1,5 +1,18 @@
 
-## 2019-04-19, Version 0.9.0 (Current)
+## 2019-06-10, Version 1.0.0 (Current)
+
+### Notable Changes
+
+* Feature [#47](https://github.com/opendistro-for-elasticsearch/sql/issues/47): Support for Elasticsearch 7.0.1.
+* Feature [#56](https://github.com/opendistro-for-elasticsearch/sql/issues/56): Adding coverage report.
+* Feature [#65](https://github.com/opendistro-for-elasticsearch/sql/issues/65): Support for enabling/disabling SQL feature.
+
+* BugFix [#44](https://github.com/opendistro-for-elasticsearch/sql/issues/44): Fixing the order of fields in csv output
+* BugFix [#68](https://github.com/opendistro-for-elasticsearch/sql/issues/68): Support number field
+* BugFix [#37](https://github.com/opendistro-for-elasticsearch/sql/issues/37): Fix for PERCENTILES query result in csv output
+
+
+## 2019-04-19, Version 0.9.0
 
 ### Notable Changes