Cleanup after v1.3.0 release

Author: xiaozhu36

CHANGELOG.md

@@ -1,4 +1,5 @@
-## 1.3.0 (Unreleased)
+## 1.4.0 (Unreleased)
+## 1.3.0 (February 11, 2020)
 
 IMPROVEMENTS:
 
@@ -9,4 +10,4 @@ IMPROVEMENTS:
 IMPROVEMENTS:
 
 - Add variables type and CHANGELOG.md [GH-4](https://github.com/terraform-alicloud-modules/terraform-alicloud-mongodb/pull/4)
-- imporve(mongodb): update the module to the format of the new version [GH-3](https://github.com/terraform-alicloud-modules/terraform-alicloud-mongodb/pull/3)
+- imporve(mongodb): update the module to the format of the new version [GH-3](https://github.com/terraform-alicloud-modules/terraform-alicloud-mongodb/pull/3)