docs: update for release

Author: kenjis

ChangeLog.md

@@ -1,5 +1,15 @@
 # Change Log for CodeIgniter Simple and Secure Twig
 
+## v0.4.0 (2019/03/22)
+
+### Changed
+
+* Require Twig 1.38.0 or later.
+
+### Added
+
+* No direct script access allowed.
+
 ## v0.3.0 (2018/08/14)
 
 ### Added

README.md

@@ -16,7 +16,7 @@ codeigniter/
 ## Requirements
 
 * PHP 5.4.0 or later
-* Twig 1.22.0 or later (Also, simply checked with Twig v2.x)
+* Twig 1.38.0 or later (Also, simply checked with Twig v2.x)
 
 ## Installation