v2.0.0

• Updated to .NET 5

• Deprecated LinqBuilder.EF6.AutoMapper and LinqBuilder.EFCore.AutoMapper
  They did not really contribute to much, all existing functionality can used with AutoMapper by just using ProjectTo like this:

var specification = Spec<ProjectedEntity>.New(p => p.Firstname == "Foo");
_dbContext.Entity.ProjectTo<ProjectedEntity>(MapperConfiguration).ExeSpec(specification).ToList();