v4.0.0

• Adding support for .NET 5 and EF Core 5
  ! Patched support for constants in the update condition
  ! Run and RunAsync will not return all rows affected when command was split into multiple batches, not just the last batch's row count
  ! Patching the extension method to replace/inject custom command runner
  ! Removed old extension method on IServiceCollection, since it wasn't working anyway