feat: Support version dependent registration

See: https://docs.microsoft.com/en-us/dotnet/framework/tools/regasm-exe-assembly-registration-tool

There are two elements to this:

1. When _registering_ we should create the root assembly keys _and_ create the version dependent keys...
2. ...if the server is _already registered_ and we are simply creating a new version, we need to create the new version keys only
3. When getting server details, we should read the root keys for the main entry, and then a set of version keys and attributes

Note: Reading data (number 3 above) is fixed with #10.