Cleanup after release v1.1.0

Author: xiaozhu36

CHANGELOG.md

@@ -1,4 +1,10 @@
-## 1.1.0 (Unreleased)
+## 1.2.0 (Unreleased)
+## 1.1.0 (November 19, 2021)
+
+IMPROVEMENTS:
+
+- Removes the provider setting and improves the Readme [GH-4](https://github.com/terraform-alicloud-modules/terraform-alicloud-rds-postgres/pull/4)
+
 ## 1.0.0 (February 17, 2020)
 
 - **NEW:** `rds-postgres` [GH-1]( https://github.com/terraform-alicloud-modules/terraform-alicloud-rds-postgres/pull/1)