Support iOS 15

[uhooi]

References

Overall

• https://twitter.com/the_uhooi/status/1431515840109678593?s=20
• https://shtnkgm.com/blog/2021-08-18-ios15.html
• https://twitter.com/fromkk/status/1440111411389210624?s=20
• https://fromkk.me/n/n2081f13b9f3f

NavigationBar

• https://developer.apple.com/documentation/uikit/uinavigationbar/3198027-scrolledgeappearance
• https://developer.apple.com/forums/thread/682420

CollectionView

• https://developer.apple.com/documentation/uikit/uicollectionview/1618088-cellforitem

SwiftUI

• https://stackoverflow.com/questions/60415844/swiftui-foreach-based-on-state-int

Widget

• https://developer.apple.com/documentation/widgetkit/widgetfamily/systemextralarge

[github-actions[bot]]

👋 Thanks for reporting! Please PR :)