message: Update version number, git mail mappings and contributors list
diff: @@ -15,8 +15,8 @@ We provide security patches for the latest released minor version.
  | Version | Supported |
  |:--------|:-------------------|
  -| 12.6.x | :white_check_mark: |
  -| <12.6 | :x: |
  +| 12.7.x | :white_check_mark: |
  +| <12.7 | :x: |
  ## Reporting a Vulnerability
  