RepoToolset Package Version is formatted incorrectly.

Currently the repo toolset package has a version formatted as `..-` (ex.: `1.0.0-alpha9` or `1.0.0-alpha40`).

However, this does not follow the `Package Versioning` guidelines from NuGet (https://docs.microsoft.com/en-us/nuget/reference/package-versioning) and causes older packages to be reported as the 'latest version' (ex: `1.0.0-alpha9` is reported as being newer than `1.0.0-alpha40`).

The package version should be updated to either place the postfix number (i.e. `9` or `40`) in the slot or place a dot between the `Suffix` and postfix number (do: `1.0.9-alpha` or `1.0.0-alpha.9`, the former is probably "better", since that is the format we use elsewhere).