Built-In Metadata Should Support Minimum Version and Required Version

In the old way we had "ModuleVersion" and "RequiredVersion" functionality in the README yamls. I believe "version" refers to "ModuleVersion" that sets the minimum version, but I don't think there is a way to add "RequiredVersion", which targets a specific version for the Built-In Metadata yaml as in the link:

https://github.com/Azure/autorest.powershell/blob/master/docs/metadata.md

A suggestion might be adopting the brackets used here:
https://docs.microsoft.com/en-us/nuget/concepts/package-versioning

Or changing the name of the property.

Start by comparing the Built-In Metadata behavior described in docs/metadata.md with the older README YAML functionality for ModuleVersion and RequiredVersion. Clarify how minimum and exact versions should be represented, then verify that both cases are accepted and interpreted distinctly in the metadata workflow.

Written by the indexing model from the issue text.