Update SUPPORT.md

Author: kylebrowning

SUPPORT.md

@@ -5,8 +5,9 @@ Please refer to the [Contributing](CONTRIBUTING.md) section for more information
 
 | Version | Supported          |
 | ------- | ------------------ |
+| 6.x.x   | :white_check_mark: |
 | 5.x.x   | :white_check_mark: |
-| 4.x.x   | :white_check_mark: |
+| 4.x.x   | ❌ |
 | 3.x.x   | ❌ |
 | 2.x.x   | ❌ |
 | 1.x.x   | ❌ |