refactor(example): make collections use Guid Ids

Author: jaredcnance

src/JsonApiDotNetCoreExample/Controllers/TodoItemCollectionsController.cs

@@ -1,3 +1,4 @@
+using System;
 using JsonApiDotNetCore.Controllers;
 using JsonApiDotNetCore.Data;
 using JsonApiDotNetCore.Services;
@@ -6,11 +7,11 @@
 
 namespace JsonApiDotNetCoreExample.Controllers
 {
-    public class TodoItemCollectionsController : JsonApiController<TodoItemCollection>
+    public class TodoItemCollectionsController : JsonApiController<TodoItemCollection, Guid>
     {
          public TodoItemCollectionsController(
             IJsonApiContext jsonApiContext,
-            IEntityRepository<TodoItemCollection> entityRepository,
+            IEntityRepository<TodoItemCollection, Guid> entityRepository,
             ILoggerFactory loggerFactory) 
             : base(jsonApiContext, entityRepository, loggerFactory)
         { }