Version: 2.1.0-preview2-30132

When using a type mapper as described in #242 on a generated column, EF Core seems to use the model type instead of the provider type to check if its value can be generated.

To reproduce, create an entity with a rowversion property and configure a custom type mapper on that property. EF Core will not handle it as a rowversion column after this.

The fix might be changing .ClrType to .GetProviderClrType() in ValueGeneratorConvention.cs, but I have not tested this and I don't know what other implications this might have.