applications.go
func (a *ApplicationService) Update(ctx context.Context, sid string, data url.Values) (*Application, error) {
	application := new(Application)
	err := a.client.UpdateResource(ctx, applicationPathPart, sid, data, application)
	return application, err
}
func (a *ApplicationService) Update(ctx context.Context, sid string, data url.Values) (*Application, error) {
	application := new(Application)
	err := a.client.UpdateResource(ctx, applicationPathPart, sid, data, application)
	return application, err
}
// Update the application with the given data. Valid parameters may be found here:
// https://www.twilio.com/docs/api/rest/applications#instance-post