Update security update table for version 7.x

Author: tabacitu

SECURITY.md

@@ -6,8 +6,9 @@ Updates are provided according to table below.
 
 | Version | Security Updates   |  Feature Updates   |  Bug Fixes         |
 | ------- | ------------------ | ------------------ | ------------------ |
-| 6.x     | :white_check_mark: | :white_check_mark: | :white_check_mark: |
-| 5.x     | :white_check_mark: | :x:                | :x:                |
+| 7.x     | :white_check_mark: | :white_check_mark: | :white_check_mark: |
+| 6.x     | :white_check_mark: | :x:                | :x:                |
+| 5.x     | :x:                | :x:                | :x:                |
 | 4.1.x   | :x:                | :x:                | :x:                |
 | 4.0.x   | :x:                | :x:                | :x:                |
 | 3.6.x   | :x:                | :x:                | :x:                |