v3-width height (#100)

* targetframework now net8.0, packages upgraded

* updated gitignore to the toptotal standard, added launchSettings to help developers run the samples

* ignoring null values in json response

Bynder/Sdk/Api/RequestSender/ApiRequestSender.cs

@@ -90,8 +90,15 @@ public async Task<T> SendRequestAsync<T>(Request<T> request)
             {
                 return default;
             }
+            // Note: for powerpoints, a pdf is automatically generated by Bynder and stored as a second MediaItem.
+            // However, this MediaItem has a Height and Width of null, which cannot be converted to an int so it breaks.
+            // The below setting fixes this
+            var settings = new JsonSerializerSettings
+            {
+                NullValueHandling = NullValueHandling.Ignore
+            };
 
-            return JsonConvert.DeserializeObject<T>(responseString);
+            return JsonConvert.DeserializeObject<T>(responseString, settings);
         }
 
         private async Task<HttpResponseMessage> CreateHttpRequestAsync<T>(Request<T> request)