Ensure next release is backwards compatible with previous versions of Granta MI

[Andy-Grigg]

The next release of this package will be a major release since there is a change to the API, as introduced in #361

However, we would like to support previous versions of Granta MI with that new major release. Unfortunately, the underlying REST API has been modified, and since we have historically pinned a single version of the bindings library (serverapi-openapi), we need to make a change to enable this. There are two main ways we can do this:

1. Depend on multiple versions of serverapi-openapi, and let the user choose which version to install
2. Add multiple versions of the bindings to a new version of serverapi-openapi

Assuming the changes in the underlying API are not reverted, we need to choose one of these options before releasing.

[Andy-Grigg]

Relevant: ansys/grantami-serverapi-openapi#311