Change project to reference netstandard2.0

[jmsolutionsgroup]

When utilizing this with other class library's netstandard2.0 is a more universal as it doesn't require the full core libaries.

[skoruba]

Thanks, good idea 👍🏼

[jmsolutionsgroup]

If you are able to look at pull request #6 and create a release then I'll create a pull request to convert your repository https://github.com/skoruba/IdentityServer4.Admin to utilize netstandard2.0. I can't do this until AuditLog is finshed because it references the AuditLog nuget package. Thanks

[skoruba]

Ok, I will do it. 👍🏼