Update Specification and other packages to latest version (#582)

* Updating repositories and specification version
Need to fix broken tests

* removing test that would just be testing mocked result now

* Refactored from IAsyncRepository and removed it.
Tests pass.

* Update packages

tests/IntegrationTests/Repositories/BasketRepositoryTests/SetQuantities.cs

@@ -13,7 +13,7 @@ namespace Microsoft.eShopWeb.IntegrationTests.Repositories.BasketRepositoryTests
     public class SetQuantities
     {
         private readonly CatalogContext _catalogContext;
-        private readonly IAsyncRepository<Basket> _basketRepository;
+        private readonly EfRepository<Basket> _basketRepository;
         private readonly BasketBuilder BasketBuilder = new BasketBuilder();
 
         public SetQuantities()