Update MijickPopups

[FulcrumOne]

• Project Name: MijickPopups
• Project URL: https://github.com/Mijick/Popups
• Project Description: Popups, popovers, sheets, alerts, toasts, banners, (...) presentation made simple. Written with and for SwiftUI.
• Why it should be added to awesome-swift: Because it is one of the best SwiftUI libraries 😉
• At least 15 stars (GitHub project)
• Support Swift 5
• Updated contents.json instead of README
• Lib is fully open sourced, written in Swift and not a wrapper over compiled lib
• Description does not say "written in Swift" or variant 🤓