Cleanup after release 0.3.19

Author: xiaozhu36

CHANGELOG.md

@@ -1,4 +1,5 @@
-## 0.3.19 (Unreleased)
+## 0.3.20 (Unreleased)
+## 0.3.19 (August 17, 2020)
 
 IMPROVEMENTS:
 
@@ -105,4 +106,4 @@ IMPROVEMENTS:
 ## 0.3.9 (May 07, 2020)
 
 BUG FIXES:
-- diectories.get supports options to filter the specified objects [GH-62](https://github.com/fog/fog-aliyun/pull/62)
+- diectories.get supports options to filter the specified objects [GH-62](https://github.com/fog/fog-aliyun/pull/62)