Updated supported versions in security policy
| Version | Supported |
| ----------- | ------------------ |
-| `>= 0.20.0` | :white_check_mark: |
-| `< 0.20.0` | :x: |
+| `>= 0.22.0` | :white_check_mark: |
+| `< 0.22.0` | :x: |
## Reporting a Vulnerability
