Merge pull request #346 from ObsidianMinor/dev

Make header dictionary ignore case

src/Discord.Net.Core/Net/Queue/RequestQueueBucket.cs

@@ -236,4 +236,4 @@ namespace Discord.Net.Queue
             }
         }
     }
-}
+}

src/Discord.Net.Core/Net/Rest/DefaultRestClient.cs

@@ -120,7 +120,7 @@ namespace Discord.Net.Rest
                 cancelToken = CancellationTokenSource.CreateLinkedTokenSource(_cancelToken, cancelToken).Token;
                 HttpResponseMessage response = await _client.SendAsync(request, cancelToken).ConfigureAwait(false);
                 
-                var headers = response.Headers.ToDictionary(x => x.Key, x => x.Value.FirstOrDefault());
+                var headers = response.Headers.ToDictionary(x => x.Key, x => x.Value.FirstOrDefault(), StringComparer.OrdinalIgnoreCase);
                 var stream = !headerOnly ? await response.Content.ReadAsStreamAsync().ConfigureAwait(false) : null;
 
                 return new RestResponse(response.StatusCode, headers, stream);