Merge pull request #45 from diegofrata/dev

Fix deadlock when calling Dispose from the UI thread.

src/Serilog.Sinks.Splunk/Sinks/Splunk/EventCollectorSink.cs

@@ -205,7 +205,7 @@ private async Task Send(IEnumerable<LogEvent> events)
             }
 
             var request = new EventCollectorRequest(_splunkHost, allEvents.ToString(), _uriPath);
-            var response = await _httpClient.SendAsync(request);
+            var response = await _httpClient.SendAsync(request).ConfigureAwait(false);
 
             if (response.IsSuccessStatusCode)
             {