Is it possible to add WidgetKit only for iOS 14 devices while the same app has a TodayExtension for older iOS versions? Or does including WidgetKit increase the required OS version immediately to iOS 14? I would like to support at least iOS 13 as well with my app (better iOS 12 as well) but I'm also interested in adding WidgetKit for iOS 14 to my app. On my first app, I already had to learn that including VisionKit increased the minimum OS version to 13 so I would like to prevent this from happening in the plan phase already for my next project.