Update SECURITY.md

Signed-off-by: arhimede <julian@dotkernel.com>

Author: arhimede

SECURITY.md

@@ -5,8 +5,9 @@
 
 | Version | Supported          | PHP Version |
 | ------- | ------------------ |-------------|
+| 5.x     | :white_check_mark: |![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/admin/5.0.x-dev)|
 | 4.x     | :white_check_mark: |![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/admin/4.0.1)|
-| 3.x     | :white_check_mark: |![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/admin/3.0.x-dev)|
+| 3.x     | :x:                |![PHP from Packagist (specify version)](https://img.shields.io/packagist/php-v/dotkernel/admin/3.0.x-dev)|
 | <= 2.0  | :x:                |             |