internal_version
The site's internal version and network used to create the history.
The site's internal version of the created hand history.
Any modification to the generated hand history should increment the version. Even minor bug fixes!
Type: string
Example:
"internal_version": "1.0.5"
It is recommended but not required to increment the major and minor versions of the internal_version to match the spec_version and bug fixes increment the patch number.