Update Helpers.cs

- Dispose of the response
- ConfigureAwait(false) the response so it won't have a chance to deadlock the application

Postgrest/Helpers.cs

@@ -94,7 +94,7 @@ public static async Task<BaseResponse> MakeRequest(ClientOptions clientOptions,
 				}
 			}
 
-			var response = await Client.SendAsync(requestMessage, cancellationToken);
+			using var response = await Client.SendAsync(requestMessage, cancellationToken).ConfigureAwait(false);
 			var content = await response.Content.ReadAsStringAsync();
 
 			if (response.IsSuccessStatusCode)