update change log

Author: inhere

CHANGELOG.md

@@ -2,10 +2,21 @@
 
 ## v4.0.x
 
-> begin at: 2020.08.21
+> begin at: 2020.08.21, branch `master`
 
+## v3.1.20
 
-## v3.0.1
+**update**
+
+- add before/after methods on run controller method.
+- support controller object cache on repeat fetch
+- enhance built in php serve util logic
+
+## v3.1.19
+
+> publish at 2021.04.20
+
+- up: use `Str::padByWidth` support zh-CN words on render table/list/panel
 
 ## v3.0.x