message: Report app version correctly via Bugsnag (win)
  Remove unnecessary OSVersion metadata field as the same is reported by Bugsnag automatically (win)
diff: @@ -66,6 +66,7 @@ static class Program
  Toggl.InitialiseLog();
  var configuration = new Bugsnag.Configuration("aa13053a88d5133b688db0f25ec103b7");
  + configuration.AppVersion = Version();
  #if TOGGL_PRODUCTION_BUILD
  configuration.ReleaseStage = "production";
  @@ -79,8 +80,6 @@ static class Program
  report.Event.User = new Bugsnag.Payload.User { Id = uid.ToString() };
  report.Event.Metadata.Add("Details", new Dictionary<string, string>
  {
  - { "OSVersion", Environment.OSVersion.ToString() },
  - { "Version", Version() },
  { "Channel", Toggl.UpdateChannel() }
  });
  });
  